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 0x6341a17ffb5a95ebeaaa2aae3872466109945760d8d0f2333ade0d6764a3effc. 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/2abca1a9-0691-43a9-baca-c2a603e59a6e.json and https://artists.proofprofile.net/proofs/artist/2abca1a9-0691-43a9-baca-c2a603e59a6e.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 0xea9df7ecdc42b422acd587b768d672442d729dd7835f55b072c3efbd4e1037fd. 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/BRWMB2200253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a0ad5df4bb5cbbf229347469bda18e1b1201870b0ea76555376748efc60c43. 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/BRWMB2100960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae60f1fd16d3ec26c746660e0331efc2a6a22ce87be6b4740a579ba2b5383e6. 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/BK2NP2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4848eed65c779af74a2475205a2fa29cbec67e31958a690a1e7ed618f24a0f. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BK2NP2400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88865d2b2024c051a6134e0f55883ed3bfbe360e145e8fe5217de90ba3d5ec1. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/BK2NP2400183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31932693251d365435f7d13e4509ae9e0e529a7703c1465ac57adc22a279b62d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BK2NP2400184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410ac53bc92df93d85a646ec20768391a7bc2e713824117e9596fc43c53fe0b7. 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/BK2NP2400185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e0cccba87b4ec20e9dd1532ec617557561ac9a57d44729b87269c779da3bbe. 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/BK2NP2400186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7e818e3e3bdfa2acae7169e101d4683fae825668a403c09a0432b4b9976684. 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/BK2NP2400187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6eadb421f8bd6b9e7dba9cbfc9be545e5279fef258bf10fb18d0fde26b7e7a0. 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/BK2NP2400188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a38fc91ba0aee554bcbd4ac4db5e549e7eee5d56764ab8498e0bf47d67eaac. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/BK7NM2500132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6eadb421f8bd6b9e7dba9cbfc9be545e5279fef258bf10fb18d0fde26b7e7a0. 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/BK2NP2400188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7e818e3e3bdfa2acae7169e101d4683fae825668a403c09a0432b4b9976684. 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/BK2NP2400187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31932693251d365435f7d13e4509ae9e0e529a7703c1465ac57adc22a279b62d. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/BK2NP2400184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88865d2b2024c051a6134e0f55883ed3bfbe360e145e8fe5217de90ba3d5ec1. 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/BK2NP2400183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4848eed65c779af74a2475205a2fa29cbec67e31958a690a1e7ed618f24a0f. 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/BK2NP2400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092351947c0f851047553acdeba2837745d4bfdfc0d9f4b158b919baffbea840. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/BX3SG2400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e875ddd8b00010d9de75e46bdcbdc71ed582e16bb1c4c9a23184f2995931f1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BXHR02300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8c8a2c14234e080a930ec03a2499f4723d94ad5f68b7bb17e758df10e70fec. 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/BKE0T2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1048de7b45aded94402ec6f1a2e743b183757f7c0a57966b83d26537894048. 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/BKDJH2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99e798a0a75c0159c1b47fb19cee906901cd57004be779e468b8379cc8699e6. 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/BX3SG2300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf699f1026b10cc0589ffaeef1845b340a700dbe01d20115e3b93bfa58fc3cbc1. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/BKDJH2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c3ea72e51c20ef4e459190bccc535250e77572625180da6bfba1150a4dabab. 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/BXKG22201395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c498b22fc32299db4ea0abb7fc20ac4b99393710b0b1b4e545db948a32481a. 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/BXKG22200628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b32d89cffc5c54633bc50fd9715f841eee7a312ce2696f79c05cb3dfb9a73f. 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/BXKG22200490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2714046db21c08fdcb1bcd3670fe8830d95ade10cc6240f79a77434155d0ba99. 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/BC8ZB2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39723ab4d609ae56f98dca629b8bc2341f8e6a2418b3a041603599220a71a362. 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/BXKG22200279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87804997cff3333d82fa52c0fdd4b432ed1a3360bbabfc2a8050f32fb82709fc. 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/BXKG22101083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee9ae3abd6eec0e72088360c96866c16fa81225068133180d4c74064d815cbe. 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/BXKG22100415.