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 0xbb01b5a5ebf58246cb795b5d2229678aee7068addb4f7d3d4754a6723e86edd2. 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/54ae7ea4-d62d-4e8c-82a6-741736bc7a49.json and https://artists.proofprofile.net/proofs/artist/54ae7ea4-d62d-4e8c-82a6-741736bc7a49.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 0x8969b895e5c9aac0600c87b432e7f01d83121cd9be800c10d0f3788f8f591fe7. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:40:55Z), 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/AR26A1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7432d868554cb96309395c6c06f040398ddcc9a5d8967639cd05ed8a2642076f. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:08:33Z), 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/AR26A1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c48f5a1caa137d222373319eb21fa97b6805a6e481eb44c9f31d1a827a3440. 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/AR26A1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa8c8a786020d5a37a5022a668cac70e6d0992a089a08303c5d765e52169253. 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/AR26A1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962815807f69a245c913d1afadc9c89adfae09d022856b82150ad013f047ec36. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:27:15Z), 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/AR26A1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9018497185a212cb806e7ef4d557d64740ceb896d50c56ceafff64b930c8746d. 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/USL4R1912800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f8b4f3ba73167e872da6d754d04a61d03d1b8fbf55ce2ce4322bc0b8be7342. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USL4R1912802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd7b5302b6ccf48853c5d6d41f8fa54ab977b06b73ca2778f9d5de4e5860560. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USL4R1912805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838fbcfff58fe29c2a21309d2a444c53bca63d3f11ea04e7f2d3e2e2b3527736. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USL4R1912806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59302d188309cdd2cdc2659fb1f4b7be6bc96e978231746a79a5b1fc3da52b3e. 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/QZNWT2374544.