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 0xeddf477f216ad1288f385f9a7f52a6ad419ba07cb5fcd769869f79191633dab4. 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/58ed33b4-8aba-445c-a144-54463257e32a.json and https://artists.proofprofile.net/proofs/artist/58ed33b4-8aba-445c-a144-54463257e32a.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 0xb60044468c6fd96e0a7e38c8ecbb4413360abb801f7c97f935bf915accdfdcc3. 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/USA2P2100619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac91b44c09836ec3b3046cbfd66f7cc1d84ab5616fc633c6386a08476bd39198. 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/USA2P2107683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47fba2c1a42e0a99550140cd33867579bafc5f4a0cf183e2d04ceaf42392ab1. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USA2P2121081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5936f2906a096155f19b454988b4ea00e539262c0cf352579fefddcdba50b940. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USA2P2109428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505c187902f4b2b358432ab2cae50f99f42d2ded1ddb36ed77cd5eef6a83d774. 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/USA2P2121080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8edc4fe6df177b680d5c24a09be130b586b222402a251962d49c95db26be2dc. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USA2P2117001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305055f476ba9e66414dec50f21e1fe69525a3a476237363617bb98b8e81a624. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USA2P2112634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc961744dc3f4805db5c241882f72c51c7b7472c47a27f73a883b450e8f9d089a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USA2P2124141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca18a6f70c07200a79f3607dd268c033afd45c9f59385ea1eb12b9c8738b079d. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/USA2P2130401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53044bf3d7074b8681c1d498e432c205cdb64dae33cf7d2a30c45d3476392043. 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/USA2P2138749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47e86e61a84393fed6afd52ca22cb48c7e5cec2ba74c450e4bdd46cae2f21fc. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USA2P2160238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcd0f167287e5c05be5406ee179bab07ef7aa359c59292c257bdfa77b976fad. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USA2P2228794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19b8edd7d5d6485a87b38c489181f7b36f3bc80574d88a89ac69cdbaab7caeb. 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/USA2P2228793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffe082148bcd6e3a8fc39ea72dad0dca11d9ee3e45c7d460dd66504d22c4291. 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/USA2P2228798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a572d170c41681afa4c33716607619c98046590b6b53dd25ef39c2cc15511e. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USA2P2240901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479a6f212a246109cd43275365b363f1bb0cde8e9ee88cae1c38078765aebc8d. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/USA2P2240900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d6cd031da715a64979daa7133e9c4219393a424b247b897c780c9a1ebe5831. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/USA2P2347094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a97e3c073448a5ac0739ae4900e5222f35ea59e9151497d35e35efe29bc50b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USA2P2350976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebbc038433fad81b8d6caf4e1a4b77eb38c2734741cab23c44ba31def41c18f. 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/QZPLR2429442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2362dd374605816e0061df513f26493f35cca2f76e797b8635c939acd565f6b2. 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/QZZ7T2415579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fe2b8cdc463aa780daffdb7d59f3e4e1a8204851640268367f29268c3b8d58. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT4C62500310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e1916e45b5894683c155b4d1805971646fbfe9aea92695567797c2defd3779. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2211799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677e2718b5c7daf65d33381a3bd9fd9a161c490796cfb00f7ecdac762d5dd0ca. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MXUM72101131.