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 0x8ce71fc23098bb6f6e7a4a590cba330472aed1742f02d6ffd3c682d48aae3f6f. 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/6d66b7e7-58b7-4352-83ef-193085a714e5.json and https://artists.proofprofile.net/proofs/artist/6d66b7e7-58b7-4352-83ef-193085a714e5.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 0x374063cc8347b0e497db6ded6f502123c0d2782416d77807d5b6a13dfbaba95e. 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/USCGH1954322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80fc24b78deea56ca15b9b6f8a590d2ae76ae99e9b2a360f531cd7d68bf2744. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USHM91929737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb471a37097f790591e199240dc7c42d0ef6f036c49c36fb89ee70b1f9ad0d06d. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/USDY42125379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2cb87c0bc10e1f226e91c31f2a1806bae4e74fe3d80c8a2e275ff10d7fded0. 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/QZS7J2365774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8baf4b3c085b980e34c788c482176300e80e601b06899d90241f1225186347. 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/QZS7J2318730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2cb87c0bc10e1f226e91c31f2a1806bae4e74fe3d80c8a2e275ff10d7fded0. 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/QZS7J2365774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda10cd6a63aecd4a881e6d737c13dd00ec11bdf876bd596b8e364171349394a. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZQAY2381862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8baf4b3c085b980e34c788c482176300e80e601b06899d90241f1225186347. 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/QZS7J2318730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbc3406a31624320e529f696d3f0e4360b3989ca88d18d9601e53421324c31c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZSYP2371639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23053ac651eb2dc52af9c725ef05f7ae462663c2bec659ab40da9fa943f0184. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/SGB502397874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efcfe6584dddaa62d91ccc61d6231db14e608d6078a2dd6b47e2bc141faae24. 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/SGB502398025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23053ac651eb2dc52af9c725ef05f7ae462663c2bec659ab40da9fa943f0184. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/SGB502397874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eba72eabec6163974875afe26c67871ce8c39256aa1422325ef04d0daddd05e. 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/AEA3A2306943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2f8e885b120c224d74047206dff14480d0db6daf19d64c7478adf3a5cf3299. 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/GXD7V2306961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e84f8c65b92fceb5f651261fe8ba45ad697fb4aff58f4854f7c162a1526645. 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/AEA3A2306940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c63e71bc55fa6a1d1a432836e6ea31aebdddab5dd266d1b4883cb5ba1b5976b. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/AEA3A2306942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefbdc71d584732254028391c77fece1c135dc552c67c6cea4367a891ef00bd8. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/GXD7V2305762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf417c9c3546a839fadd3e29bad2501243afffdefcdb9aa763eb97cd318a7a740. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/AEA3A2306941.