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 0x2424ba6f65549de345740ca95ddfbe37a7cd986d6419356b8fcfdc6b49f96402. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91c3fcaa-b98d-4341-845a-d260efb3223e.json and https://artists.proofprofile.net/proofs/artist/91c3fcaa-b98d-4341-845a-d260efb3223e.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 0x7e96910f40b5db9638c1e59831b893af7a8b2662620683c9eefbf33aecbf7d96. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRX872199515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29294bf2e0815388bd4d6dbf66348c959f950148548258684b2a180186b7683e. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:05:54Z), 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/FR10S2226591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e8efd204aae082a30ddbe7aec50ccd3d221b5e2207a61e4ab7d5da20b71d51. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/FR10S2368836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b07532ce7bc5d2c6f06bb94f526aef15af4096201e3740b3015bf5cde560b37. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/FRX762398219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa774e7b6a4db1dcd4adf7255d499059b027689bd19ce9b4ae9cf7c69d12282b. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:40:47Z), 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/DGA092359283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099a28f452d4244ff12cf345e4f88b6bd4159a916c10d2e4bbd4cb613f272297. 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/DGA0L2314585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98eee51f396fc26f677807f9ae8c10a03dec03c89d063462d1022251cdeba6cf. 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/FR96X2440392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf43b1ad721b8eb5950e5b002ca13a69b8c263be908d4ce10e62a232ec02291. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/FRX762424799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7139f99dcdbb7899400db2c44b41631e9bf4f817f97903eee2165e017033d01. Chain 2 (Bitcoin): anchored in block 957737 (2026-07-12T18:02:09Z), 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/DGA052497165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cf4cce6f04e966bed870f09e17a35bea0b922eed438af6337659d8cb4f576f. 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/DGA092426861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d63524fd503f44429f116fd5e8204ad083f88b3f897aa86b794870fe113ac7a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:25:43Z), 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/FR10S2553313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ffda4314438517a467d92c79cf69939de330ad1f87bd1a768ab313c110ce29. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR2X42518183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fafc068ffc6fa276d9c2e111feaa2d45171bbebe2696481629e26f3111d497c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:07:21Z), 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/FRX202537704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac94f94b19b192f88eb32135478756dd26a51475ff31699cc8adc98a52896bc4. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FRX872572612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6e1a3757644c2ef59d993001b6c8c7b86131ff68ab338891934a04ea6289e9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DGA062582846.