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 0x906f89846ff02221bb3ba116297541fc99ed8544292fc9eeb36e4ed9ea0abb95. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a150345c-abdb-4d76-9d4d-5549d84a81ab.json and https://artists.proofprofile.net/proofs/artist/a150345c-abdb-4d76-9d4d-5549d84a81ab.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 0x0ff419c9e9b8e14981882355c86c6a621c42211a1ea091013dfdfa446deb55a1. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:07:28Z), 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/DGA0H2308124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3706fc566cd70bf34bfd8b4a32c6b51f8e2f9145cb84acd28ec053af825e87. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/DGA0H2308126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd750c4c20e1330e6653c883c7085c7e2218176acb101481ac990af8f9d6a9bdd. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/DGA0H2308127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3176c68ed926f8f8b8790fcfa4ed1280f328722299aae199acc7fb73d9aa11c2. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/DGA0H2308129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedc7bbf24e336fcff26efbcea13e51eba91231d10d1b3ee0a383b18c057ab3c. 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/FR2X42598712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c541abdda1b683145bc0ac75e437f837fd7fda2c91eb854d65d239ee65c7611. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FR2X42598713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ae53c162f5b7391902bab2be42cb7bd3a99220afbde952faee079efcda7bc8. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR2X42598714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cfee897d7c0b91af8d1e6cf02ed472c730052454badd937053c66c3093540d. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/FR2X42598716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc049f768e0674a63830eef3d9b9573c9f1280f0a3ff32dd60540e9c4c5d9053e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:12:23Z), 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/FR2X42598718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e78c2ba7c182aa49bb341d571ffe51e5224d1f2a3e571c322e8ed5a03e8c7ff. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKE022211427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81205a35c2777c3e89f2c674974de62cdce1d1be2576cd9c7779ed0e1642f5f2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ852314774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb249978aa35cfab9908c3665c5c2a1644e6f90955cfc7b204da584fc935672aa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKE022211420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e231c07b3a6e78c2540b4411df287d21cce44bd1dda07da4aaabbbf1605b32. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CNZ852314360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12884fc3f07b9043362d3d360ed04c803f00babd07200dcb1fcb47141d9a9ff. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CNZ852314354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143b9a6bf76a401f20a92ada100a9fbe41c4d035c51a326d38799af27f0db03c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/CNZ852315182.
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