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 0xec40df119006d0680d3a30491845c30c65a4ae6498be15df0be823cf588b6d00. 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/d1e68c90-2698-4430-9240-56650b99c9d7.json and https://artists.proofprofile.net/proofs/artist/d1e68c90-2698-4430-9240-56650b99c9d7.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 0xad280bbd9e0ed2ca60f8b4f13dc1bea8a1cdd62712d153aec40885bd88618aac. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/FR0O70809236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd4f43052e9e73274edc05624a2908f192bf4e5c80049de3274938e947ca9f6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FR0O70809241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80652291fe733a460cfeeb9bf8daf678faf100b0ab9402af7b3b6b922b5559d. 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/QM4TW2397032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12a83a32c375fea303ca2b425b9522053438ae5a3fd18e5151a5836b182d611. 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/QM4TW2397034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfc3950059d06e6bbee4e6702434fd49c72146395962d4d3b56affa831dba1a. 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/GX89G2366311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72e6d87f47ab3eab5dca52ae24a05b5b2608dec2859fbde59c922a27c509fdd. 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/GX89G2388159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa440944908e7a105957f04ac8da868121175fd74c5801804f3ef660ecfd1091e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX89G2343566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fb9bee7b5c9a982548b883905f33f7e46efcdf568459eadd7abc7c33ca9f10. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GX89G2346687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afae3051526c8a4801150357f22380e0548b6191ca46505154298eb67ffeaee. 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/GX4R52191502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc7bf3cc293d5e3e7a9e0e31be06220159eded0bb029da25a4e7ef247ce55a0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GX4R52191508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ffc70ba1fb74fbdb3457bf2cf7bbf6a301b0e2f3d3aabe5cd857f84bfbe1e4. 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/GX4R52191509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f211c5a48b86f2a57962dff0ddfc7f07f1992e1dfb78cdc4c13c2c1d64c08f. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/GX4R52191511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba324741c198170a70fc5f7d63311b0b180905e8b3ba5ffccef159d2bb5bf391. 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/GX4R52191515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4ece974abe41e1b1cd288d6ce945cf6c97e4fd064a6eb347ad08172dc96258. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GX5MX2270777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6489228000f7f925b708f9beabafba540a03cf014c70cc71f60f5740ff46b155. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/GX5MX2270779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e52186dbbcb31c7eacc61a4a18bbb10c114ddb6c9d69fefe1113ce63b67643. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/GX5MY2285483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da7f89e3514a143d9ac0e703ccc16812f8f5a2acd320ebed6094771028d6a1f. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/GX8LD2329493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1f9760416be37cb0fca27dfa279517d24d506fbd296dee617a4d4840201d98. 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/GX4R52366429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaa491961f7e35d29d53a37ab7243936df095e6979fd8d17b1267784a1a2e88. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GX4R52303638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950b14e4943e0f7769dcd1895ab049a0eb0d33790305dd679c37f0b967346f7a. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GX5MX2335482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060ad8795d297529f66d3379f66b0b481f1f18abe00b0dda17fe0d12784cd757. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GX4R52435334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26229eae34e1bae65579f5f1a9538af88048c386fff92f6bd2521b3fad84633. 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/GX4R52407964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762c2e9b010cc2778d40c795565cd975481114bfb47daf79d2b8054b6422fc1e. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/GXBDS2502231.