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 0x952d3d543a1a7250161b82cac4b4c491a44b26c1158f3ad33ce53162ffd03ce3. 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/3ee2d108-c32c-44b1-a510-56726c2c7e77.json and https://artists.proofprofile.net/proofs/artist/3ee2d108-c32c-44b1-a510-56726c2c7e77.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 0x3fd43ba7b4f16274657db010e16760a5205567ab80ef86d927acb204c553f3df. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRX452091065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fd7e68d292623256dc2a16acc11d261eb17157a4a4000247e49cb6abd2df83. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GRUM72002235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fc64388a87f8db3e9af716a36b644fd8d942b1ae20bd65f6e22d35b802919c. 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/GRUM72002836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c00a3faea29c9c9d230d5cccbae67cc0b4816c8cc997e51a9ead445a3a81918. 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/GRUM72002840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7008da32594cca5cb1e7d9d29783c820d1408069c6e5f45e1c453aa1da4465ac. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GRUM72002842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d84d4bb10ade18357a6e51299f6923294bcbb73a37a0e601d91b3c198721e3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GRUM72102101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74d7b819ec89c2f8e5bb34bae07a73201860377f6ce10db9e5ee687e3ceaa12. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GRUM72400806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1956ae1037dc29a782579e02352b4ab6a46764b38175e7ff42a2949b31484c9d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GRUM72401233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ebd2973547b50d3471901fe06f6ce935fd5a945012318df612979042e205e9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GRUM72401235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf222f2e746431df433f1e2f38832954ab1e9ffc9cba3c010d2d5def3c07f2e9b. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/GRUM72401236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cc4724f0121bff516c84cef6fe0805758df63d0904d41a30136b98d14aa4e6. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GRUM72401240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346bce4c9489b8c596329f246fe21ae6a16995f7f19f6c42d6194180b4a983a5. 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/GRUM72401242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ffcdd62ef5b00837d787bc522d4fb299469ad9b18ebf46ca6d5fcbfb739d8f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GRUM72401246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0a5f07367b280e5194aceaee59d03ddfa74cea8a6d088954de9025ab04c8c8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/GRUM72401249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2877dedf94ba03c4c067fdd9160ae9bf62b8c653a11209bb59a574814fcda9a3. 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/GRUM72401254.