1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa072806b78892b5235c6e4e7be07474b4e99b870b3d6cb838a0ee28f9cb9b7a5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c78ff375-7641-451f-b23f-c16e9a1bf326.json and https://artists.proofprofile.net/proofs/artist/c78ff375-7641-451f-b23f-c16e9a1bf326.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17bef4547110a7fe9826d8aa7adf5817b70c8ca0e3e65669887da3b65d84d5f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFM2116411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72e09bae8af109ebd96a4c88d4da4fbc7777ceb5372fcedf46a82118e70f4b2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFM2116529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aacafd929705fb306eded014f848d112dedadbaf3e1e96b8ff1450a470d0eca. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFM2116270.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae381d58519c70a3c73fa5a89899fdeac50fe32f7169c92b967b67c9559abef7. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFM2116336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf33a910b3dc8f6e1d0e0d9cace03e23331c7c0c095ba1d9355f59b036eba34. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFM2116371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2865b3f21cc6ac1f6d93f8c8d9beeb5c82fa147e92bd340bc82f769f9706da0f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFM2116454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdae58cfc5fed17bde0c9d54326e6f87b66c2460e5c36462cc7f5aa09efb044. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFD2097360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2809e1df6fa3864fac76b77c5f807642bb53a80918932d30b2bba0ffcb1dcd3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFD2097378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee3860da9d59584ce224cbace7c22c72403076e647d646f290cd12c6e6eb07e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFD2097380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa000abf9a0d1830c72f17ef21b87d7d076cfe5818e3b8c1e22f276f1e53aa297. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFD2097296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cba88c99b8169c3d71cd3d7c3bf5801aa9918ad0ad4aaa2f6eae5540476787. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFD2097362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4382c656d04febcd9e6de647085b3b87bb44e7fa45e7a0d44cb5bc31137f9851. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFD2097366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4534562c80b9b1a148e42470808c355bdef52cce57b3d02bbc8cc5530b42c491. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFD2097391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53109f6874db688cece926716ece158b13e8bec016f31c745bcd1527665b7581. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFD2097393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca84e55728999c2d0931086a58171107dc7f53d13373ea85ba4581b5852a04b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFD2097394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9eba6a42edfd2f1b93b8c88a9382625f86e2a05a60419a3fd3ee01aeda4a07. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEA1852498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03132cdfd60a0a1a2f4bd13d4fa1aa7d7ed91275d3d3b7982609da409a5e8f89. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEA1852500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec723d79a4335a121278a026f777579113d01d53f6fb8076593b4824c3cf31b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEA1852505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30523ff592d7a796804747f683308b6c5bc07d95c6d0a7dd266e61a9553324cc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEA1852509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a6185711a18e405fd8257ec35057bef24e28e6d43900907841e5fe86a749d9. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEA1852496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dbb7a6e2d77e7d7ecd029ac883b691f089d1c8c8c9dcf949cf910ff26a47fc. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEA1852506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1f538760004bf10373d7da7ef1f2d82a3590b7a81fb510f5b9cc276835ad56. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEA1852511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeada407dc521b764c8f242cb6999bea0c3b9d0def8d39fbea43b67eea7d3653. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEA1852513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6831e93ac4c8feb99de9ba42ffb87660fdb99f8d4d5778d137b965efac8da27f. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEA1852514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160f5d091169275469580ebd0497e204ac65ea1ea95e2d1fc75ef453b96a9d2e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADR1881438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1393db1d887c767409ef036a93c7e64d87440655392dbe065f5f60a5494c221c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADR1881439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02de3831ea22c92f6c2fe1cec8e2724c97ceb9f4e3cd97aa5115ec5747b9914e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADR1881442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ea19178344c1e695b4aab921d5c3b620169c64a4dd19778e5e80281da85882. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADR1881430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bcfe8562817fdd2113af4cc3b8636bd30fc14b5924b847300cd38357235682. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADR1881435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0e776b51231c2a91f5a96a03c4c5feef4275de532a73cd8eb3dc89923a53a7. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADR1881437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84355d399e00f38130edc651158820fa9c389cbbb62baa5c8b2c201b0b3dc593. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADR1881440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb614e6fe3f9dec505c156b3711f90d11aa9d31504ec1c88d2b53533cd142e36a. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADR1881441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2870c707f1e9e88ba71f8fe8e79397b391ef71956da555b047b7f99e37b039b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADR1881507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded86811cbb33a9788a992c3c89e80b223bf703f8780e2a3905657b3457759b7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFZ2264909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b9f30373681fa50297686dd6cd58ca4b277a4845a9df77e95e771673e85d67. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFW2181633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04102d74604b26405479a0a450f435134127f1b538eb0c96100bed07c6577d30. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFT2191493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea5a226077e589983782e40efd94c4f245e61cf8097b21a5111196ef6597b62. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFQ2148588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3fe56436773daf44388bb8ee39a2ab6754fa8ba9f458faa48882356090f49a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFO2161295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818151c6bbf16bf8393da7a220e15a762c886d088e87b4705769a9f149cc15a1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFA2058030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d75b9eecb19665248ae336a2b2d63a5586b7fc8f8aade46299f079639e4669. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEY2002131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f408f8132b3ba39ad3bf41e94ac840207b5fcba22a425164e3e593eb56e6f2e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEQ2030668.