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 0x4df45451ee03d6ea7938a06ac61c77702fdaf28b136d204ee6aef22f926784c0. 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/0284561e-f74e-4e98-a6d6-74b3e5800625.json and https://artists.proofprofile.net/proofs/artist/0284561e-f74e-4e98-a6d6-74b3e5800625.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 0xde790f83f9c29bad9990e7db8ddae6054c4d7d95b9947804063baf68f1add0c5. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/FRZ519900152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef279dca8d09924d0da019e22cbf76213b780da52d80fe08efd01bdc16628a8. 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/FRZ510200315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6995ac8affff53bb0a25ff35c830bfe93df1f91c6668ae0cff8032057853c95. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/FRZ510200321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38961655215e027e271df93c9bec67be61c928d6878534db45048b54c9640acd. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/FR6V80933348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6eeaec2a68a45ea71145f20440f908c6324772aa6fc774d58d8adb6b71d44e. 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/FR42X0700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8addbb7a745822f32f78d4a9b9db3b19e768ce54aff1b68823e59aaaf1b75d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FR42X1200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8e6a88af402a9be5eadf4e75cb49f89a77b97bfea42f056821877e2d3bdb51. 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/FR9W11405288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c11e0b346ecd965620e86ac48ac24947e81e5452cb959959513ec3a5f478976. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FR6V82458600.
Un Short Et Un Maillot -Version Chœur Basque
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419d9606150fd0450b5bd88b25f17eca3aa69d353ae7e3568cf42cfd576ac9f1. 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/FR9W11405300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ccfb315c4d35a22ff04b1510217ebc2d269bdc6cbc275b0dc842e412eb5afe. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR9W11606643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3104b0aa432655d86242f028b69b3abe675cbbe4b6c7092e96269dcf9281ebf5. 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/FR9W11606649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b0e9bd23e38d3e7d217bd82546dd8f89f76ecf9fcfcd6b2c98cc77db2a4371. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/FR9W11905905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fa219397675d8baf416a6156fd191e86f6fd7e1044e0906707aa1c4c319958. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/FR9W12207368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0aea792545e44fb8aa85237790701811866cad85e351c6e7c9a9b4093b75a7. 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/FR9W12237284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefa94824ce3e934b9fc61c78073d9b0f68270d0beea35e38821e6c12608e59d. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/FR9W12363882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f89691db413a1b2951f865ba38446dfc3c11fb080d117f09a0288867cda59ff. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/FR9W12452397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95a324b3e63ead0fa0dd79fe59f5609d991f838316b95087218ee24b19911f7. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/FR9W12507240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0d348aaafbf917e843f3213ef3424b55d364552eed360c7e009dd1be1ee737. 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/FRZ510100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7a2860ebf742a6f8edfb5f045413f8aefb1b54495a5c624b8dd3a2bfdf5696. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/FRZ519900154.
Megafiesta n°2 - Dans la chaleur du sud-ouest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9267561273a9a3514f93cb5b905c49429a4104d3cffe033827629ad924b0292e. 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/FRZ510100017.