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 0x8c3606a69625eb7ffda30d05090bcb8aa500e2ddf53f97feaff4fb747244cc2b. 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/64e76240-ef5e-4259-a175-5667f1a424e1.json and https://artists.proofprofile.net/proofs/artist/64e76240-ef5e-4259-a175-5667f1a424e1.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 0xbc8790996f4a8057c07606c6e056f0684b4dd3b6e276a6ac72165df8c00a7961. 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/FIMTA0200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5affdb7f306bba275b17c39f29e0d5687a3826915da2165aea602cc7de2bf7e. 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/FIMTA0300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cd4e7a631f1b73800518136f455064c34c52b270f60ce56d6a013eee0f2a14. 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/FIMTA0400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44be34f19b114e52d05879290e624874b3248c0c032fe312aa15d824dd0c754f. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/FIUM70600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03391046f5317f2df8dc2349a71583bc90679e0fc2bcac9d77194842cba7efc4. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/FIUM70600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6227a17ecdd3150b8d672da7079cdb5a48ccaecb5338b905f0013a1fbbd44bd5. 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/FIUM70700447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb721750fab40d672a29462cb3b29e14ad130293d0c04524a894cf011ecff65. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/FIUM70700454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145f8f5155393e9a1469266f14a647a14ccaa8865f37c2ae144d5c7ad3070780. 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/FIUM70600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8207803ae455dec0654caa58ff24b3aa416334b53badb7bfe1dfc1c927a8c4f7. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/FIUM70600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4b13ce9ae5047c6edabc7006b47e5072ec7efb5fcb7889c90128779e0ccbaa. 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/FIUM70700460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bee454b942d8bd42e971fd0c9e388a821d99a470dd14c6ba685daafed4ddb1. 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/FIUM70900487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab5bd01ced3c6a0d94d2b20cb9443db1abd5c71357a58ab563b4b1a8ed4153f. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/FIUM70900488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fca618a61350eb87657c2d9a88311a9061fd8824a2c496cd91a8c35d31acadf. 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/FIUM70900490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879d37103c6b02b8cecc455b583e7116b5f51f3c252045a510b3bf891109cf93. 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/FIMTA0300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad311326995e5a41ab198b1e725e70d5733dc2a17c9c8d574dee48f77a22fbd. 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/FIUM70700399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fa5fc5c3eb823b479901f00860eff544b38aa13f2d3226ac4c0b7c3f3f0832. 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/FIUM70900431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44be34f19b114e52d05879290e624874b3248c0c032fe312aa15d824dd0c754f. 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/FIUM70600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40c65948ef30d27955f4f232e488b83794644ad142917e977a5708513aa60e4. 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/FIUM70700451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbee0424f0a35482d766941412f1f9283d1b1af40157286db20fd780a977a97a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/FIUM70900489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6227a17ecdd3150b8d672da7079cdb5a48ccaecb5338b905f0013a1fbbd44bd5. 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/FIUM70700447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6227a17ecdd3150b8d672da7079cdb5a48ccaecb5338b905f0013a1fbbd44bd5. 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/FIUM70700447.