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 0x3a562ed04ac34b1f5e2513230703377dd9f579f8a27a9a88b681b9fc757eb99a. 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/41870cc7-2848-42cb-8613-9054dee7c882.json and https://artists.proofprofile.net/proofs/artist/41870cc7-2848-42cb-8613-9054dee7c882.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 0x73547a15b678d9e843edc0dfe26777910596f2252f83d4e770befe4af1fb4bb2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZPLS2184564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955d27986b80a3c2acd8b7c413460747d75a6e1f7f89e9e572b1d7cb17f20a05. 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/QZDA52274326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cff9fca5880186e36d2f64fa7908139b9cd794646504584d5a76dd04e81224c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZDA82204290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bcc7e4083fdfdf2b81a0374c58aa4c5564182b670a4344e9fe47c2f8ecc05d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZES82286799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5f4a82cca54e769ca36aef3107331a4767afa082a67ba8e91245a322f8270f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHNC2291234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cff9fca5880186e36d2f64fa7908139b9cd794646504584d5a76dd04e81224c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZDA82204290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c987be649c846473395d4b11cc9608069acb2a9d59b53c6f599b2ffe9e2ac4d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHNC2291235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b7ff3ca55f538ad4e8c74d89d2e094dc6833dd9164413601914c3fc561adfc. 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/QZHNC2291236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6f1252e6c9eb95962af0e7b3804c293c4fd6a594afbb25ccb7aee59f052ace. 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/QZMEQ2352914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c18419912477fa4f4435459d5aca41d584727e88af701856bd3c6542ccd7f9. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZNWR2331788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e295dbe4b928b6eb10a32c072c90b3caf93168bd5ddabb88d2987bdf7621525. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QZRP42331665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca3067b2c1c939263067e3caa57b01106cbc7d05066e5762416aaf5c270ff53. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/QZRP52365178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb4012d68f44d9c4c861ab36d2ebc96d37014a3c38f306e59571985a5b91870. 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/QZTB22363389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1743395e05ad81651e339d7dccf1442e2409f9bafb56fdb9d1dd58eceab5b2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTBA2318252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3527059c9d51bdc4af3ebde7d0e4ff5cbbfd77a7c687bfa75cf3463edff7306c. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZFZ72475923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8287e9e17c9c5275806357609841965997445fbc15e9d7435b6985e86e533d16. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZK6J2459824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548ec0bc02ae84343b8bf4d7f7bce6d769f7baca2c53696bef176a176cc1bcb1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEQ2487132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4d37d536f6dee40aed5ddc9c01a48015a77a651d4a8858b36aa21e6b37d343. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZPLS2451288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb13bd995fd061a5c0e038e383bf301d101956db732ae306af7865c80df9162. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTB32419015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ead4cacd43734738102bebffaeaf72b6185fc70ca909481f50bc0a76c4766b9. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZZ7V2518555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a46cd3fbfbdcf8f8c9abb715fec82931e09a1e13fbe42b61335c8f569f45deb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6A92096440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d7cac81f5414730f112393601b3311548c5874a56b2f5909cd823d6f8b9ec5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMEN2193004.