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 0x99134cd0a940a8f6fd3bb1aecd62d1f91b5f9806fb1b94df6245d334fe43dd0c. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06d085a8-cd65-438f-bf2d-22e25e33649d.json and https://artists.proofprofile.net/proofs/artist/06d085a8-cd65-438f-bf2d-22e25e33649d.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 0x48e365875e9db18b659d2c1c0767876761b36b6079d954a1857c889c7127babe. 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/USDY42522194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c83d6ba159a3c642d1ae35b2b3d1fa9a5a0625b41bc0a9d74f6f6a56dfdf65. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USDY42522195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d081458851701f74a9ad3040fe1de6d1d5035c350e3066f9d54f8636582c9b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USDY42522196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042b7c3d1707b328ad80236a0dd366a0b83439af8b8d1d12381ff085949dd470. 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/USDY42522197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94db7c596f4352f23595c65ad810914773d3e0ac84a5327de470c460bdb96092. 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/USDY42522198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd10e6f5f7c4ef14e1e7b6cfcba6bb7d5ee68638a5d97eedf0865136263245d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USDY42522199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4be86b7785d5c8a5f596abf754b86c756a449c8117e68303baaa1c14281c055. 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/USDY42522200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1d7bdd81250742b43ac744a2e0ff77089ddc256abed8883d2cdbe19e7619f0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USDY42522201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a80dc216e7e50e5923fce32ac850facf92ddc1bf9960a6465f5b19c9ea52d31. 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/USDY42522202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd763d24509b210077044a691cad187f5be96ceff4b32e9f3f262d2996fef4db5. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/USDY42522203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a2dfe250c93b39c99621497f0d93946966f7552b98b0da0e969cf97f840be9. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USDY42522204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7615a0bfceab4e1b79b236bb382de698d0de49ba93c35eb71965da6fc69b11cf. 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/USDY42522205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8432b8e3a2f5773062733c8fd3bd619bbd0c7423d265785f90d519ee9b086ae. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USDY42522206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4e57d075b9035edafd44005f43e425a5f5ab3079fa5a24dec661434b7d4c0e. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/USDY42522207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411fd432d9d70834673df3a9ae777417d52c5b6fd494bd622efe9f29313506c8. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USDY42522208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff72571f74c69ba0fa428e76db34c7045fdf412c2f2ad4b4f5533344adec4c1. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USDY42522209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c0c14f8b19eca225374cbbfe5ba025fef166dfb61c3f1bb5b81c4412388cf5. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USDY42522210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457054872aaba1ad1575f2b5d9381e525e6fff223e1a91ec3c0d9fc869f6dd4a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USDY42522211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe88b0b7abd51d234b56438f4b93fe4c92e9d99ba4a55a7a457c4cc0087fff04. 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/USDY42522212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540fe822ade2ee214fe9e9d583c3c07d809ee220636f6eda89d1eac0b597cc4b. 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/USDY42522213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957026178a091e0eefe4f625d78bb9b0480ef9f997775d5a40f17ef64abc038f. 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/USDY42522214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330e08ed3b09cda4e715f651aee82e0c49053e7328efcdc8a2983f40aaa89a77. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USDY42522215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72547819fa5e93c62f77d56e771064bbbc0aa638576762908e7cdf2f11ccbdd7. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USDY42522216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574bbd45b2c31642909cd13eb0b641de37740cc066702a06f86631ca4f727031. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/USDY42522217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffb17df9fd4eaad3720ec2463c410622beda6eb40c5137971d7179addb12aef. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USDY42522218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f561aaefed5a110accd80264734ceb2017fc2c5f3757deb2809dbffd5e8e40. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USDY42522219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacc9880a4dc802a3c37ef40a639d0b5267495f4a274c6c2dba5fc1bb458412d. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/USDY42522220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0974f48d3b3e6a2589fb456d8c45931717395b7854f3a425467049b02d10a72e. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USDY42522221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9046d27389a148b2494808f6655b0ddf2de7d7611e8813e186545d0f0d27b50. 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/USDY42522222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1921f814cf5c0235c0e0ea9389395f47c8495aa41b1b88eda6f950d864199139. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USDY42522223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019a54dc51cc7f9717a423f3d92ec2c08d8304015ed28597f4d4d6347e83b5c9. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USDY42522224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545d927ff2e563711be60dada96c8451541205099f76d045bd96ae1e56555466. 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/USDY42522225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c9f1b01afa094727873d676001da01402b6a4fe148f331120a643f8a925522. 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/USDY42522226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb54d17b1ac5ad7a4074b50bd5d37efcb85b5425292320224a401e05d4c6c4a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USDY42522227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0807c547c0cddc680008f124462aac1fc7b21ddef0c8a1bef620debd0756264b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USDY42522228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb75923ea0c78ec5c2aded06ab1b970963bf032bcc591b42552f7c8746b9352. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USDY42522229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea4963c7fa204194babfe2c38179c3ac53a1627ca7008d3d495ac4d2566a04e. 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/USDY42522230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f746e1d6423d86aeeaa540736e603995ebc49db3ce21b40809cfcd4fd31a2d7. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USDY42522231.