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 0x80137ad6b5e5fa70564221639f3030d7753bdc3734a725c82bb2028f41eb166e. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5066bea2-02f7-4fd0-9b0d-a42fe49870b8.json and https://artists.proofprofile.net/proofs/artist/5066bea2-02f7-4fd0-9b0d-a42fe49870b8.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 0x4618a602766c6d41db218e2a09b1c0c98c5138d24795964e7c8ac5bdfcf3b398. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/CAGOO2227516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17773e065452fec58b9b8570de63f9a00ef4d867c07a1d1777fdf1cad20c61e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CBEYJ2446536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed2b60ab83206045af6b7748e10366f9771cd24f69ca083a74cd8d9f4b45429. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CBF8B2437865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30caa1ddaf8523c71b50d75100de3152687f69f5e0b12b3b32abed3a7d1b2f1d. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/CAHQJ2558928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe262383249b9f4b3f8be2c4d768a28116a9d18d7951cc5a0a1cff2d2b7f2d82c. 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/CBF8B2420987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0300e32d446063b46ce8169c91ee9c21174f7fb969b2c166723d61769770684b. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/CALVP2453973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005d2188f8b8d04a4c6dda3934e1b6e4cc652e1b28ef1075aab4cd11a6c3d138. 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/CALVP2460155.
The Groove Takes Over (Summer Vibe Rework)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb68a783fd5efa549d2c134586e13d8385e38fcddb5251ae23b87265c50e3efd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CACWV2561539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb882032771f9274d23467a8cf5efaae65669bbcc6b0c7774d00dd1d02aef68b5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CALVP2492073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55972944070eaecb1c9428bb3c9bb9cf306f6d2613a18f9e9032f209b3a2bb91. 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/CBEYJ2403001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6810aea60cbf70b3c613b108746aaa6f83957f8b5401bdcc70ef51e725afc27f. 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/CBEYJ2418579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794c9ea93c62140c4d0d61961e7d823df3ba82d1b3a86f6dbfb72207c8efcf01. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/CBEYJ2418587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79768bea96530a1b648bcff15b04a5682cbb9c790c1b1b9bcd8bfa879c6efbd8. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/CBEYJ2418596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800baa3f809fe6ba7045ae537481d2ca0fc928e00603ba01c63cbbbae4bc8325. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/CAENV2500870.