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 0x53c9a171340116947fbcbb18a3d47f71596a06da28bccd81896c732a000250aa. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/103d9a6c-4b0d-4c6e-9447-dd3a43e181fe.json and https://artists.proofprofile.net/proofs/artist/103d9a6c-4b0d-4c6e-9447-dd3a43e181fe.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 0x249174a49402abe9da6987685f99e47accf4cff3fdd7c03be401bf1b177a33fd. 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/CAN111800314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc4c4df5d7eb21e970429890674ccd081cf0b7b1cca87ee595a25849af8ddc8. 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/CAN111800315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b5597324419cb8e4c764b9d2135e1b4163699ec5964ab066338cc340db1e76. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAN111800148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9294246b3a8bfd765acb79631520514baf8896cda3b636b2c535d94f6d86aa13. 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/CAN111800316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4981e824ef34186c1af7385278b4b3d08c4e3fd2cfd0100e8d710d1f75b1c08. 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/CAN111800317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f2ea8041cec4a357e1dd8110e24c858b84081f1743be1ecefa1f25062ee5a9. 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/CAN111800318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1805a702b75839389fcee397852b9eafe2a7f6f94a274f7eed99546d0add987. 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/CAN111800319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba3f218fd083b7f41837c0abab35da733a3e679f6e118026b8daaa524e64e3b. 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/CAN111800320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc26bb8139f62e5e717b340d6ac7903ee6c65f59e35f6a9c1d7c9150adb0afc. 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/CAN111800321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbd78d3313b891d73d2b437598345059375a3df6601adaa442e160b0f7b694d. 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/CAN111800322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3ffdd530f108073e9aaaea2740d63a17950cfd1b19992bde6a4fae9250780e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAN111800290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ba43848d3a7c01c19747e7e67dda49ae20720e8c971d9908c715071943051d. 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/QZK6P2437623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33b005d33b4c5b06182e4ab530f26795c9f13721e7a51b00abda1ea9f0ef54c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSM11501744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3f12e35d30890d9584553d4b6589d0d21584257541a51e8e77bf53be2105e5. 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/CAN111900000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd406548c9d6f6c6339bdfde9a70213a9322171b4d62f833f7d0e5b3979f7508. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAN111800231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90d5661a5a0d9f4f75b6057c7c0ff8049b2af2c81a56677e41ad12bf68b0dcc. 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/TCACR1648290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e78a2ba39d4504997e753847ed0db6a00d5adcae6b688a8b0c37b481488878. 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/TCACX1711018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dfcab432a78221444c4988d90d7c0f77af380e3f5ec281682ecdaf9e7edad9. 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/TCADB1790488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f058063f5069a99ff155cef82f4583728145b2f5ccdb7f53a98e90306c282f0. 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/TCADA1775719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f058063f5069a99ff155cef82f4583728145b2f5ccdb7f53a98e90306c282f0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADA1775719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e78a2ba39d4504997e753847ed0db6a00d5adcae6b688a8b0c37b481488878. 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/TCACX1711018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90d5661a5a0d9f4f75b6057c7c0ff8049b2af2c81a56677e41ad12bf68b0dcc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCACR1648290.