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 0xdabaf740fd66fb530ae65c215398fff4892632f67ec02d33150f3102601723ca. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e255e268-48f0-42ca-a3a4-7e856b475372.json and https://artists.proofprofile.net/proofs/artist/e255e268-48f0-42ca-a3a4-7e856b475372.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
L'intégraal - CD5 Twelve Songs in French
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 0x07615274e95f29f2c7bec83630416d8afcb58dc9256a0f909834c24c0e4a5fc0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAGT2348074.
L'intégraal - CD3 Devant des Gens (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9416f0a5277999c13bb32c1abc1ba976270aef8bdfcea28d5c9b7943f65f5d9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAGT2347777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839fff31d05ebf920b4351455106bc97ce943bba2ac45ae16a39295bf8b5b7e9. Chain 2 (Bitcoin): anchored in block 957287 (2026-07-09T09:48:29Z), 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/TCAGT2347855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e359852a087a3ca237ffd0c77545e3b3bc65b476b179b551b19671bd8898d53. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAGT2347909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaddf208041e44591aca61addd67d54077d0ddefe6517999bb234ef0d131b43d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCAGT2347887.
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 0x1a5910867796616de7bd49842dc3a5b65128dd036aceb232c100082e59a9bc4e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAGT2348809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7785acf8f43cba257bee6abcc16ae686591d860407a560c41832f5c8f24e9f9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAGT2348822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252eccd78f8e28adba089ab6fa3eaca45b8f9cf6d7cab8d7946a5ae2d103e8ad. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAGT2348830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5483ea8ecc0041b79b29a01e20ffe4866faaa1f8ebea9fe1e5de3abe3fe3b4ae. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAGT2348853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25463fc2aacc3d6842393d9bc7c64ea051211012ca90e384d806c3d564cb214b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAGT2348915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6803d90faebe47c1f2d2ee6e7cd6798f65f17037aa1eb535b43b4a894dea94. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCAGT2348843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661ecd5934494cb75431df5965cbc50f6add403bd315e7e779fab17a369e611b. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/TCAGT2348876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde8a970a57e7d6d6b5f084df413c1beed19527d7e7147e3fe58e9f5ff2c8a77. 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/FROPM0500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d436265e7d87700b9d989774254dec4413fcb7f241dd08e7b1d24b3ad3d5dab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FROPM0500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92096918c6faa5b676cde3e8b73bcd9d01aad992d5de3a058b1de4310efa4201. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FROPM0500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34eefce8925b9389a9df98ec4e2f00e1a71cd2128ef2d04f2da3db9df81bd95b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FROPM0500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc608050e7c6be52ad79fe4b792b0d783db1e3a3ac02a1f88baae8601ce4867b1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FROPM0500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabc655d87003dbd60eaa596adbd9c8c0cc0a8b552873f446ef263a630fe6869. 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/FROPM0500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4445d41fb424ae10012eef1f7db74715363b48fcca86a1738156a06c0d3be8bb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FROPM0500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2528a5f645a6fbd9f2b53184459d854f8045565da6529e98100d1a14a637e48. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FROPM0500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfc55b7dc8758e0767af43bb9b1fe85916fea6a5d2dde860caff77d357f6067. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FROPM0500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3388322eb5fef22f7ecc1c76f4a30124982ec0162f95c538f613f765ed93d0ee. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FROPM0500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f26a752d638c9d8da84d7a564c070ff5d917ed7a4297de3fa2019b1374e7f0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FROPM0500200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ea20c1ac9a2459d37a3d629996452c674dcd5c25824a593cce4effb49b0f1f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FROPM0500280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881f9d31ca9e5ff6c5b5ffff5b14c7543a41682b1e20332c8ef889d1d9203bf5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FROPM0500480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce3935b583f47d2b7af22173c18a46f4186b72ca06664f227efc79efcea50f5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FROPM0500460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1237cd5d5824104085948995aea22fc27aae9ba2f01b028d584f74cf8136d97b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FROPM0500470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5771ee1ade6c8c62a25665bf3bcdbf77c01d1d18bdece76c951af22dae6598. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FROPM0500450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14233e5efc42d052b426c12c3c93419524537d33d4d867d2cd0f083619efdc66. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FROPM0500410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdec1f2e2d537f99aaae63f07fd096f287e11be69741648d16ada879a0a29e74. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FROPM0500370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c158f7fdd6189efb8c0f43268999c320e43eebc11095bfbd15c4ae290dd099. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/FROPM0500240.