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 0x17c67c0e32af5b389a986c17cc032dfe920e3907ea3320a53151ecbaa91f238b. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0456b293-ef98-470f-b0c7-1c886b02ba55.json and https://artists.proofprofile.net/proofs/artist/0456b293-ef98-470f-b0c7-1c886b02ba55.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 0x4eec8fb9f0df776253a308eefd6a1660c2e656c66fa748755f4242c2dea089e3. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/BE5HY2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4218610595c7649987c13c8821b1628b45923fe097344de683b24a74e3382e9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BE5HY2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0535d2301053b5e549619a62f5262bf79bf60ed6e78198940ce0a3773deeb75d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/BE5HY1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39e4d32afa4721271696daba234af9e4893957590edec67fa2ce13ecb7e3519. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BE5HY1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa026b43546571358ff6238f36dc7ad6103d61bef9890d4991280c38ac612b3ca. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BE5HY2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa026b43546571358ff6238f36dc7ad6103d61bef9890d4991280c38ac612b3ca. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BE5HY2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c6047a2ecff555bcdce1dc4ac4a7f4320338b97f7a193205cbe08fa0bf3d0f. 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/BE5HY2200003.
Avec le temps - Reeperbahn Festival Collide
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c917e989906bb5f06b43e293329a2e063aec6b8a6c072f7dc68ee737438fab. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEPI82307193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadb90cfc534ffb877411b62b5a238aa23ecc9e0c010cb8ceabdd52770dc14bb. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/BE5HY2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c6047a2ecff555bcdce1dc4ac4a7f4320338b97f7a193205cbe08fa0bf3d0f. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/BE5HY2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58547c9342d9b29377b82f7761aa6ef1154d2abaa31d7de8cb893c90140f13e3. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/BE5HY2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c575ee108e98213ca01e89179e41fc575ab2ffd7aac2c169606c8668af8366. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/BE5HY2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7b15a443e76379c5785f7952e9699c6dc7360d78cb94520c5978fd0a0e12f8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/BE5HY2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a736821cfe504ae98e3a40bd50edae60cdaa3c12e9ff23c0c189d67d64463fc. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/BE5HY2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87296f6b2876e14a6e5a1e57462d6393e6fec6aaa6455ecdc06e930b5c94831a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/BE5HY2200012.