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 0x7745b14bd237649c5153c12edcf2adf5043a9eec54f0224419222f51b6ca34fb. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6873702d-a68a-4f20-a63b-2b295d0e62ae.json and https://artists.proofprofile.net/proofs/artist/6873702d-a68a-4f20-a63b-2b295d0e62ae.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x84f14a018126ea83f91b048a23d18f0435ee9cd0aba4bd057f7952178946ee86. 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/HRA041685128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bf0a582e00ae764f4394a476ec9a451d3a39d8898e81655c3dcf3969eea096. 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/HRA040751340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa904ef70bbfb7958851c2dc6b2217237854fd708991d325904ba9656de894683. 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/HRA041685129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9890932ec35c37c7d8c657896b06e475099f4525f58fa232430b0f591cf5d18. 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/HRA041685131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2aca1abf0516995bf9b92414e9fd247b284af71a6ba142381e2bac9e96c922. 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/HRA040617333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a1f473d64e71f2793905b2f1b949d942681a7ed5739ff53caa7f5d03ca7b2f. 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/HRA040546158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4004f7cd2f2f503050a2d82b5cc6082ac3fe595b439aeda38043c44b1c72c4f6. 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/HRA041685137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3581b9f42dc5a2f76a49b47fba7a0713bc2d534438cdfc03eb65b01f9c93ae9. 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/HRA040546292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff00cf3fc6f5a8c1fb2590fff0bc2490a6455c838df45bb7ab624727243f0f8f. 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/HRA041685147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41eb3e6674689226514ff41277e590a38e521bbb47bd9793a2cd43eb21efbbcd. 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/HRA041685148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227afe3a9d206ff69ef2a915cefe23281f514557fd7c6573a405f40c93c0e13d. 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/HRA041685149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88a6a1dad89be1dcfc9419df9518fd3f2e03d76fd65a94273f6e2d87493deff. 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/HRA041685151.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930fa891e61b39cb0c09cd4005b220766d99f392018af5932391c6d2b37803be. 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/HRA041266325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b03de51668133adfd4e5d106a4700398e0a5ffd9c369194881d35e2fe9d18d0. 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/HRA041166300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bd3f663e447f492198c1c32cb41795c1d438e206fd40a9d1e69bf91457068f. 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/HRA041582024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f5dc1ae7694377f33e61fa22a34462852c045fa66707f8c22e0ced063f45fc. 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/HRA040754970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59db5b300ff6fc37d35f244e56bccc0d79fca54a845a4e0f05e545289fbc7858. 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/HRA040754972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e3c31b2bc9f5b9094219986cbcb7bd5ca7c04e36ada9e2fef3c7324d6fad0a. 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/HRA040754979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2bd4e46962024faf262bf7a8f8eb640708f3d4a3c515233cd198e586e18a65. 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/HRA042500748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d627a898298c26b407bca5406b4a679a4ae5d49d4d41aebbd486f7e75c5c790. 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/HRA042500749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d08085306c0e4795f368699c3994a4b9c9a383a58d09f7e1ffad17b2d12d6c. 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/HRA042500750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f892e363af9f878f450e1df541d117a8e06e683cd3ec41465d4980967f51d32. 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/HRA042500751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf314b781435218b5bb8c7a506b4f6a5d43f9aada8d099a6fc7f0c3e6fa2b588. 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/HRA042500752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafdf34975245e8099ce62c10c657e6693f223b2c359902c917b300ba1815299. 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/HRA042500753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b2502f677c54785d2ebd3dab8a6e0790734144e64a995de90241cb30e7ae6e. 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/HRA042500754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd5ccc92cf8b7aef8fe7803b4ecf9ac03be49cd074b9eca39a1a5e513533582. 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/HRA042500755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb276a9b8e115f48224fe5c68deedcc75007552478660ecfbf464bb904c497f81. 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/HRA042500756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f618d5dde38c7f4ea1b28165399ed2f36136ea0db2040c611fa6060002b55a8. 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/HRA041374544.