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 0xdaf9fd1f5e7e326597e213d471e522cab6e7e06287673cdb151da21de17f2a8e. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c001a3f6-2fd6-4d5a-a517-17c8353bd249.json and https://artists.proofprofile.net/proofs/artist/c001a3f6-2fd6-4d5a-a517-17c8353bd249.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 0xa5eeb639b259b4d6793042cef896dd40618e7ede96058c728d797443d5e77af0. 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/GBBFT0000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9024ba0f6040976da1763f4fe1365421cfb8adeb83e10de03bcde2022deb1362. 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/GBBFT0000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ca4356a2e1d2ea25add7c406bdc94eaa15ea4970b3d85d9ddf40c61ecc15cc. 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/GBBFT0000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1569bc9c9faf3d6c3f11c2f51850dd5d02b9040414df492124006a1c9810a641. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBBFT0000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5abf594ad8b43bf6c6b4614f264c6df1a79a465aa46e24fa3bebef271c9447d. 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/GBBFT0000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fa7f297c977f8702cfd0e5bfa9b8c2be449dd00c4e0b869954d993dd2629b1. 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/GBBFT0000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf181d569971e3f8c3d5cc31534128160c146c11671acde0bd0fdb13dbd8e56f7. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBBFT0000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa79b4c6af47dce632a24fded1a2e1eb49ad1f00e482bbcf7638238b0152ecd9. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBBFT0000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99a721958b14f4bcf2c16793ca0e03a93e1dc98fc6e71ecffbf86e07945b4ae. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBBFT0000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f49cd33f2bffaf103f964710442773528a0685f124cf1c13d460188c214706. 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/GBBFT0000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15db3a309ce73cd60d98e8f277611c223da5195f3f4d156c32cb08905c1b0233. 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/GBBFT0000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad68345b9429371ea94ec15cab34c1e0b01e62d32e6e6f488dcd52ac60aeb622. 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/GBBFT1600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a456262ae7a9fd8cb439b6ac64765173dfd4d60f87bc0393bf595f075a7efa9. 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/GBBFT0300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6199d9a58937627331bdb9e4b8d5ebd9d30d9a4bab5caa3bab2d594f56b4ea9e. 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/GBBFT9800096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c5c0b0bd8d5686bf3ed76fd4f7a001c1250e523ed88cd1f60f28348c2da807. 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/FR6V80705300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1ae3592646d321d5993a046a87efcf652731f10daca76056bb1eb8526f417a. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/FR6V80705334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9b959e6bac302eb1948d8b46d655a0630d29511a63f74fb9f1cb9727cba0ac. 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/GBBFT9500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560076647193d5674f732e5b9f69950f3363c88f1dc10451209ff0308d094651. 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/GBBFT0300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddbb10573e7fb971f72d7e324cece67a23ece994aad084f5500a15092030074. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBBFT0300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f632e5881f4372e4d0917639ee89a368f09467f1d7c2fae269a67f567add9f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBBFT0300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ecabe2112269663c7d9af4a9ab735d677dd294074fecb7d538d5f20141f086. 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/GBBFT0300047.