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 0x9af934525607a53563373f76db2b48363ff6e8e3f9d4ca633e2864779d5f2790. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/351f8fb2-7d0a-4395-a98f-88b6e2f64f39.json and https://artists.proofprofile.net/proofs/artist/351f8fb2-7d0a-4395-a98f-88b6e2f64f39.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 0x33ab6a95eeacf6b26b89c702fda6c883ca8187852f1173b9b630315d9c8735a2. 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/QZTAZ2383975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2e4e505b525ebac02ab6532577241f39cc5f6fc8d2e2801de61a338461fdef. 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/SE6I32308742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430b78f5eb208826a715962ffb6cdb236cde5c626fecb43c03f970a715c97bf5. 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/NOLPX2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88712ef1b35e7ca3cb45eb7aac9840898db5c939145b0e38b8ce36b0cd4c4c02. 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/SE5752418717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c8f38d628c0227d27f5b250db07db36b637b86500680b9aab8d330a8b45812. 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/NOLPX2303010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242dd4b4f7184a60c1fcb81a86a7ccaead218b15e70b87e6485bb1f9aa99da96. 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/NOLPX2301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af14baca5e3e4fb7721894a21d6978b1d1284ab74a7cf319631ea0f24f2b22a. 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/SE6QE2375181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdc999cd454c3e628ae854eb83dba24fd04412056edd897683aa5fabd924beb. 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/NOVQO2339090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edc960de10cdfadeaf06a43cd3db51e88bb1eba6fb58fccd43710892eac11ef. 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/NOBXE1502252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01e7270877ad89888ff0d56ddea7ec6924cdfb3137b91a27a516f3de4e20663. 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/SE6TI2318511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6b8ebc4d64c00a2a251a264b6b047796ebeae1d39753abfd43f5d7c729277e. 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/SE5752393444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81f13a90e1cad1db57880d9c82e3e9a67cf033e6bcc83d420af97cb6deddf65. 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/SE5BU2371048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1651a1f5ab51bd3ce922904370c6aa1ed0ae4ded57afeebff48da0b62d07e649. 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/SE5BU2371051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4809dd3b7f6ef3cebbe89c8ee08527f90679d8e2614668fd11db99740fa708. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:06:30Z), 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/SE5BU2371049.
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 0x369fbedc41ff4759bfa834f7541ac945ae50573d2f31e04dae28878704f0785a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/SE5BU2371050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7453a2496f2da09d722aea80113131ad606b08c10ca7734324460db946623d. 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/SE5BU2311914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8723308fff33c0eb2a654c37fa94b49d431644ca65e5c711fc0c27b12956cca3. 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/SE5BU2305464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727a367d3de219832c737f5fe24ffde254c8dfbf2d706dac1925d085b99240be. 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/SE5BU2305461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1ef7dcc05fd1a5cf6ca401816aa7c624f831fb13178ddb09d544795d75b9f7. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/SE5BU2305462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db2b7c5694c5fc0d59ffd1ed7e44a56813549849c4cfb46e6001a364bee5466. 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/SE5BU2305463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22808ad364534e39e9a985886aab89096bebd137d328cc62179b752b4c33b6f9. 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/SE66N2271233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a26f13e0d25191f8c29ac9b619de1c2bf991ab5d757df9e65d888b0725c8d9. 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/SE66N2259356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed03d71b1d4c821a24f0ff28f7b048740948985726bb8ec2c082a51b6f14e8e1. 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/SE66N2230338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ad1225430538706422382a9af0df1e243c7187f21e98cd6536836b070e6896. 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/SE62M2255812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65d35ce4287c12282cad66b41eb43abb27ab81e4e7d72605e5cca204070ab4e. 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/SE5BU2283396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb402a8e9e8586f44bef9e38b76b8fbc831ded062abfb0e3625a0336122a42b. 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/SE6XY2193060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3cff8bd6f66b2b401a439dd596fe6bc1cc2a1b070aaff1ff7bfddc7c838f40. 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/SE6I32458747.