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 0x921b6b215431071dce498759375a184ad7384893bd0d94aef0933a7d3f02ed57. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b2b4f26-b168-4b3e-8a91-3ab7cf421c52.json and https://artists.proofprofile.net/proofs/artist/4b2b4f26-b168-4b3e-8a91-3ab7cf421c52.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 0xe40483cc438c5a52c5b7af7f9c3dbffded7cb92ba1e71a5897cf3b7b1a481f01. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ72076560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db36a7d483b26251a3e8d9efea25519001a023c0436b5b5482c789d1e93330f. 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/QZFZ72076562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aaa53e2680d6f0d1df431c33bec10d7fcd075a0a958109268af7ac8193305d9. 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/QZFZ72076564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32400828a67dea21ba2e93bfd4f04c758cce35254939fe78d1d029fa55873e1e. 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/QZFZ72076565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa116b648a831557c5f9d371fee351a71531e1d4626a7c12f5a9e21e6c543a6. 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/QZFZ72076567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cec9fe6ba2e7c57999d90891f8a17469a2da61cb997d8bb5198f4209b6aad0. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZFZ72076558.
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 0x21861d7a1f90082a56d4377d65ee74a1aa13d605952371697eb447e0d5bbe418. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:41:05Z), 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/QZFZ72076566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514cdb23f080d19a306519e7da204db04b829ef62821aa0dd73f5bdaf54193c9. 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/QZFZ72076559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a25fdae12f8c863446583805022ad8f7d73455596814ed490b83e7dffa34c2. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZFZ72076561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60ea2df236a5ee6e8a26ad00435d17c395650909dea11811d83ae90abc27b79. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QZFZ72076563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd955add3c6be60a9807ab4254e4d2dee84f87f554524fa0af2e4cc3aebf2ffa3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSMU5784683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd83ef2ffec494a891c9153cfdcb730c62163f37a1d8914c407ac5760d3871e. 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/GBSMU5784686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1bbf110eb5dfe815f524114143289f45a16602d6a94ceec4536ff648fe3ac3. 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/GBSMU5784687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a30912a00a6e881e2d2a958e104594d0ae415b48e673d6b085ca43cc5c24c54. 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/GBSMU5784688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581c817dbadedf7f891ddf3b2206764103d7f1d47272bedf6dca301fd3cbc1a0. 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/GBSMU5813727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b210777c27982cf8b933c5f1e2058261b5dc3da95793ab9f7efafa1ef9aea9. 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/GBSMU5784690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e741cc57690f49e9f4cb0a722f7e067ac683008b74bb2f9419dc52cab18717. 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/GBSMU5784691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e938fcf7d7f73e226ea4b7b135c26406081c3fca347f7b54209bfbea34a3bc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBSMU5784692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3644991bfc228fa0bc2db4dec03a532839a7e5ceb8fb9b05f263125632e58ab. 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/GBSMU5784684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc76be343008976de5c4c3104f08f35a9aa6591bc6554861ed8f7e3f80c8ae27. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GBSMU5791817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a4292094094ebbaa8ef37bfb556e12a83f5d16221da6760c96885550e45eee. 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/QZFYX2102820.