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 0x20ab45868cb239a5ed02eb609867d6c08b02a91181f860cc1e0a22dd65c0191d. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b6f4cf3-e464-4de9-b76a-c09847548a1c.json and https://artists.proofprofile.net/proofs/artist/0b6f4cf3-e464-4de9-b76a-c09847548a1c.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 0x7f89fe23705966ed601a28038b812320b1e66f2b927442dd25340c8776d1f8c6. 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/ES5370300583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37cdad54dcf72ea948259610b637f902f7ed06e55c432777694deed7ec70f25. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5370300584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce6fd5fe78fe76374705108f4e5e2fd5b5fccb66df11d3731f7e7451972c59f. 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/ES5370300585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aaab5ed04d3ffb9cb20514ca35ed7128b17f800beeb53345bf54cadc707d2c9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES5370300586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c84111310ca39ec31f285f6393d852ee4cc1864dd8f856aa3de996cda04aa1. 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/ES5370300587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe965b9130e629020e50e19d4141a18b4c22a6a7e9ee499ef97dfb3614d2071fc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5370300593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a73834444956a0355e49136d517fa27df305c36b12f93e9d6a0e2674c71f8ce. 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/ES5370300596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36218a77d42f16814eb25bdce188ec843f68142ec1518d006039b003eadb7479. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5370300597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9783e073f0d2e936753b7b38f9d0cc71024a14e2fd7684a4e8018d89272626aa. 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/ES5370300599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7027a27749056fd10b4edab8e78a5432f65ed94ad8e4da242bf1e6dd4def52ae. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:35:12Z), 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/ES5370300592.
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 0x830eab44d8dc522f3af4166a406f74bdce482592b93f13995d4d33a893471c7e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ES5370300582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55fbcedb4728644bcae516befb30e3ca69bbaedb6c4dd8492aef02a82164d40. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ES5370300588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342c8a03f573416529e261aedd528d47e72142fd1d031fe510c275f7684fb8a5. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/ES5370300589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b58c3a6dc97ee342aea6d3eda4f59f45f16fd3696cd40fe53e64b1a3a8a6ce. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ES5370300590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14a0e31d10bf4efa5329da906c7e0e7e6f8399a0462e516dada09a6b459b650. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ES5370300591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabda18c022c9f6730b44a41db40c0bafc8de979d7bb55f598615ae92c7c51d7b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES5370300594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e3bcf2d9983e58f23b8dac7675b1307358ebe082ae6acffc36cadb5ed8c841. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ES5370300595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fc3847fe76adeb8f0f7f52c76ea08b176255f6cbe0b57ddc95127a1e52fe12. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ES5370300598.