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 0xdf7bbb89050aed350985f088a4d9dd0603c3c6e26c242cf848c5084b27355f91. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34b481e1-17e7-46eb-86f4-6211bb208ccc.json and https://artists.proofprofile.net/proofs/artist/34b481e1-17e7-46eb-86f4-6211bb208ccc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
18 Zapateados Ahumala Calentano, Ahumala !!!
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 0xa633ebff0137a0b6ff640a20cedbc53b18a2dc4469be9f334b8cd8d1aad4e4f2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZDQH2364316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0796fe908dddc32407a6bf2a46287f40d59c59009d7bf3d74b4e4840633b38a7. 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/QZDQH2146832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f302ad85599efe9532fe290582dca1f7ff39608c3f995893c30fa8ad2c570c. 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/QZDQH2147025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf149261e15ffaf3949513aa834fb56775fedc495359c975cc0c853f8a37506. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDQH2147026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a50d9db4a3efb06cf923e15edc4302be1f6b096580a7e1901fa36efa177435b. 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/QZDQH2147027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d23c9759ba36479c1c0745caa43ca530b7a0784cc0e7d8dec26a0bb2b24e158. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDQH2147029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb754c67aaf85d7becb897e42e4c7570f20a96e5ba2e4b735b18ce02908f351. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:56:33Z), 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/QZDQH2147031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf11d753e27652599fe115f5b26385cf8ec159f5fa2731ad17dd9e7c72252a79. 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/QZDQH2147034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9891aa531e65a263abd86efc2e37fa130f872fd4d6bd0952db75a22187a34e1e. 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/QZDQH2147036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbb19c1072b50934611a4278c8567912a241344a0fe7b9fc31338ff7002919a. 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/QZDQH2147037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153b78dbbb366c1fd66516cc0231f0be620295275678b445601c5b723d7403ef. 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/QZDQH2146817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c52ec7cd6b0e62455cb32b4c2899c34a31a58c23e324c7a5fc346240b9459a. 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/QZDQH2146818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d0e83f0c07066cb0cd79c54827b28a02621b6f458bb9ef5e42be342361752c. 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/QZDQH2146819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b93d77e3a81c86c2fdf18fcddd73448613b4fe0f6acc4cdf1b052828a8df0f4. 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/QZDQH2146821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddae4bc2e0ff43483bd479a2ac1dc422aa6f64b9b4e3f8c9222a33bbac181fe6. 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/QZDQH2146824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd9cfe7a7c9b7c702fb47ea4808e3f1ff5efcb46ad73e4cebec8ed4539723e2. 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/QZDQH2146825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb14230aebdfb86588a28f2266a2b2e23b23c3ab62c71e6e41787cedc99a591f. 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/QZDQH2146828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03253d38f8884d740c53ac1e033781881d3986da8a545cd2c8b8fc385864a8bb. 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/QZDQH2258650.