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 0x2a4be8fa723353134216d8e390c43c18b69449adabe63aad1eeaafc5114e036c. 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/2a6f2628-6383-4f99-af16-4bd71a8d736c.json and https://artists.proofprofile.net/proofs/artist/2a6f2628-6383-4f99-af16-4bd71a8d736c.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 0x869b134d848232b8884a4364aa17a79157ba104fe7e2e8e0703f62c1be586e2d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SEPQD7420040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b4d47afcd0563eaee84db8e34ef4de67de94e4e7c64a622357baec66933cd5. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/SEPQD7420090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bda8f7101bcf43f9fb119a22ee3dbdcf12ff437e2fe305c0ea6d70fdf7e5ad7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SEPQD7620010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e7b1e78c19ed555c1931ffe7fb297b8d36a09974f24ad1aa278bf0cdeeafce. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SEPQD7620020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a553dc264218b6ec035751783e3ac36b300ef4fc5f62024178c4b294419bf62. 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/SEPQD7620040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddce6ec0ea58c5531264e39823929049662b14e4bc7b0e943bdfa660379a860. 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/SEPQD7620050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5ceb2659aafb9fcafa4e64c3dee21b5b80cc284823e7e3a9319440c451a9f8. 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/SEPQD7620060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe48a2aa52cc1ac415805e3391bfa4b75bd7722c9b12c856ab6c5ce508d61bc. 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/SEPQD7620070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45106e89b20b58b3d36a3cae18f4614bbbb6772754d938f1932a6f8cc4b35089. 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/SEPQD7620080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d57dcec900dc919231a9a7428a552483c7db2dfd691302da72b1a4ba8f90f00. 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/SEPQD7821010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e83af26923a1467e1611e7682584bd0548dabe8d5326456ea043a7772daf9e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SEPQD7821020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf651340583db7f152dcfe7decead8cdf16d49c4b86abc8361d65ece5ae33cd7a. 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/SEPQD7821040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80920686b2912ea1934fb9995cf3267f04f963cecd89820487732b6563cdb4b. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/SEPQD7821060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961b7ef8fade72f875abdecba54a764d0e3029e3ae7c3ae4476b48a3c2447caa. 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/SEPQD7821070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d8df4c540e31e0e790c1eab795c8afc314d192ac2fd2bf7f8bb2bf8f8314dc. 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/SEPQD7821080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f23826ace083070d2133bda29658fd054556a519389791e179faff209c6300b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/SEPQD7821090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7595c47629c0ea643b6d23885b187fb33c9b19650f9167b7b8ace4180e0daff. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEPQC7607060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa240950a3651305e3f3dc7e26ba82fb809a2dbcad7abd6a28f11388fbfab0088. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEPQB7612130.
Metronome Records - 40 år med svensk musik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a553dc264218b6ec035751783e3ac36b300ef4fc5f62024178c4b294419bf62. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEPQD7620040.