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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06c82bb70a0ebd79c9c5f5721ebb2c469a53b3aa130253eef9455bdf844a796. 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/fd0866f4-cfd9-496f-9d44-b0f5f4ed3518.json and https://artists.proofprofile.net/proofs/artist/fd0866f4-cfd9-496f-9d44-b0f5f4ed3518.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1766edc2b74df1501f82fb543d9797f7fec9e7c0ba782a0f11682cff06806cd0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:04:35Z), 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/FR0Z50070243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74a8d488b01bbe15e6a8f9e1e99177bfb4fee281f0e9d9033bb35b72e8071e9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR0Z50070244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8a4049d996652101a69d8601295bcbc1e118718b192a74e084c4eae2e9d4c3. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/FR0Z50070247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b8df1cbaa617a91bf6214f3aef3a9df0a008b58448583c616ae60f7515593f. 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/FR0Z50070248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a00ec9aa605a24c031797137968e43a1a4b4e63c270d5c32a53248c8a63cf99. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR0Z50070526.
E.A (En Attendant) Gwanzan (2ème Partie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf839e528969fe04ff597ceb9b4c28b2b1c022cb639dc3763da6042ec20836d45. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:20:00Z), 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/FR0Z50070522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290350650eedbabae020d4eeeb276083b211ad02ad112555a81c265ebd06bdc1. 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/FR0Z50070523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65eedafdfe31804d2929d96b88b5cb3e7560e7f009d7bef7777613ccb7fd8ce8. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FR0Z50070524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47995ac9665fd1c97b2cfb3bed6c3e482f5ce902501a8482320c05c5a66b7f01. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:49:32Z), 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/FR0Z50070514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd576a12d352ff06e72fede8e44adf4f3ef5d2a99849116a8222aa7cd9cc70808. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:52:41Z), 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/FR0Z50072057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce92450cc87335283b56576b7e23e8bf87f2f461bc517655c20563c4e1dd4a1b. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/FR0Z50072058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea375b80b0cf1e26c6f4dafeb2f3e24ffd5e1a4198237209312fd7ea435aa55. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:11:54Z), 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/FR0Z50074291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eece9c3d6eccfcc1941d5cb6b0bc125c2b2b8cf1df78dd53532208fa050ca2d. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:04:40Z), 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/FR0Z50087844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefe6b80061e262c3e5b21b88cbf505231173bde8dc960d613b5d8698c0734c1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR0Z50087850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a8983020630b518317b69c7be892d6ffba7d53736c3037a52beb473d534111. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/FR0Z50087853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7fff91628a446d73803530bcd0b2ca16f338703cc84da120190cbd84dc2d33. 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/FR0Z50087854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc28bc0611d7cf86d9fa427e8e41b68666c9b51beb147912c3db11abfe2f530. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:35:58Z), 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/FR0Z50102539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db402f031dea1b7843a84fb021a05ff509f65be362238332a17731cb46fe0b1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR0Z50102542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bfcd79782716971757e3fdf431b2c133a8087d4b073e3005db817b7cc4da89. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:26:59Z), 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/FR0Z50102548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf340917cee2f8abadc3f53c5a2ae0a3418a441c3b49a6cc6f9bb60e3da4e01. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZPLS2318386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10dbf1d66f131fbf6222dec502c325a5341c3bd944397fc2117196994b9a77f7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR0Z50106549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954f9eff0d4d7bb1265650c555de08051c9db16c5a26e3b6e5c422e186210aa7. 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/FR0Z50110010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eac7ca80641b0007061d15297c0c4490709c83a4b29be4d44d02bfdc09c95d6. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T15:41:18Z), 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/FR0Z50116234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf060596e304e25ce33b703a3ae366031257a458e125182fa7874727f080c95. 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/FR0Z50116588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409842d4f522d489166c59dd7079a297765f6d9d5edda64601fd4947b1ddf2cb. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FR0Z50116587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735d7a36eb6dbf1098dcaf414fddf8646e365c6b7a71592bac1797b936bbf4dc. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:14:07Z), 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/FR0Z50116698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d9e636826b80521b13f30ca55e4d4a4eef835002e851e0b4f8e492952f9343. 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/FR0Z50098675.