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 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 0x6399ad602fdb48c1f68a33e79fb42cde386864cf2646d7458906e35d7dd233d3. 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/8029629b-9d4c-4aa1-b68f-2aa3bc53d6d9.json and https://artists.proofprofile.net/proofs/artist/8029629b-9d4c-4aa1-b68f-2aa3bc53d6d9.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 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 0xc05102cecb50a29b128015f4b37528b485b0dd08d707eaa4a09237bc798c1c9a. 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/USA2P1940156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3239d4d0b0093c0fb6d6eee32624fe4d52a5e0fb645b7b944e940b9bb85d34. 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/USA2P1940165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae98701835ca6b378c16ad070154472dc32c8d12e5cc82c7808376b05c183b1. 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/USA2P1940164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1a0e43261c7f1e7650604cb1f359b8756618365b01b3f7c0dcd9ed4b2f6da0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USA2P1940163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51744e9aa5f678fa0d431809f34b44f191a71886bd73615687d0ecc7409e6daf. 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/USA2P1940162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b5ee9760acf6b64be6936f5b2d8821298117e2baf7bb8560fa2261050ae14c. 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/USA2P1940161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf151ebb249da32e35e2962ddfc76f94294086a3dbb6afd864e83167ac081fd1e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA2P1940160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66de23ff356047f2c865b75cfa9a645c585137fc10ccfc19b9ecb98809c58e5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USA2P1940159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fbb2eea4a0120e177d6a969f4674d4c049452fda5fc1273aff2d7feeae01c3. 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/USA2P1940158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a75f9d60c46879d04affb5db46afca01b0a0a11ce7b81b57870d22e746d35b0. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USA2P1940157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a903fb9ff0a49635bf1070cb6e66af092046df165e8c3a4130bb749ec542366. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZAPG1783309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f7e8525ef0f9a15ab2fd75f255318bfb6a5494da62dd36354b996345bab793. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZAPG1783310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e785e90a4ec4630a9e252781b98862013259d96b963b09857c5d6d763ff985. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZAPG1783311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3f5ec6245b715630baf498639cda2f33ced4bd78053d20924eba1cb641a124. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZAPG1783312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ce410d0c3c97ad9d061870a5c33910beb18e240edce9baf00b8fe9f8e44465. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZAPG1783313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6552fd0e27ac816da7c1ccd0e162a34e434d36e9d6ddd76af6625f74e4eb614e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZAPG1783314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e1ccae28be8d7244b07d0c26dca3b1a11a18521e8e267e78b65fb9f22736ba. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZAPG1783315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47c9e6d75cb507d8fd1f4d6665f6260fef7f3c33046811faadbd3f8d366d1ad. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZAPG1783316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e2cef464952080e48aa6f902c21fbda4bf4d4fe1436237dd903800e7fcaa7c. 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/QZAPG1783317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e19013a9b4887c7a4bbe7224c73f2a32ca049862575485bffad7973fca898ef. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZAPG1783318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5b9acd6c32dc7a8405a702b3d653224230810ce77cd4fb2bd7a28486afa834. 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/QZAPG1783319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba90991c2c56fcac06c532029b9abf184f3847269f324a4d90af5de1c88fa8a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZAPG1783320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902043fce50ab8b004be62df9d1da4f913d8d8f141bf122b038db1203a8a24b6. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZAPG1783321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccafe9ab7815503bbc9efd819cea52253bf42be3f9b063d5334cc8d52f334fdb. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZHN92374479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d1ff906be39292854b8bf2f030fa50d5099132db58df17bceb2a807d1bdf8c. 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/QZHN72007096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc1292ed5d1ef88b8fd04cf9fb8a3fe80cec0ce14fdaffabf45f43be8b710e0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN72007097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95606250e8978a30f42122ba44e4bb2f2ecdf345dd621025ce32f1ee211310e6. 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/QZHN72007098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6611855eb976bd52aee61c07e0db0c2c80743cc8021b5787a755f183b4c702e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA2P1921615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4fa54947a73afd5ce31a52ef942184094bc6090e77b221b150c1b904007fbb. 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/QM2PV1661856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bef1518b853e9cfd75a7cc028f090c3ccbb785b1825d1e1c8354247a27784a. 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/QM2PV1661857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f824dc6e6747d9c43ee78bf300cbefcfbe81c1421b20e3920545f967ca1bac. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM2PV1661858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab21f39bf4460015c8a44008e46b8290edb25a950a2810658805be141ccd2758. 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/QM2PV1661859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9054843a3fde96eb2fa5bba4d82f8cb38873ec4a128402d0e50b7eb1ff4f2a7. 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/QM2PV1661860.