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 0xacf201ff94f22709730de676c1532048b17223780d150724d9555eee511b88ab. 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/bf5f4cdd-c73e-4516-9025-668cef986a9b.json and https://artists.proofprofile.net/proofs/artist/bf5f4cdd-c73e-4516-9025-668cef986a9b.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 0x2c6567f522d85b9b7a31b623e3613255c6dcda9834f2aadacdf590c9e71a9563. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:44:06Z), 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/QM24S1916456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363843154ebf2f6c2196a84a4904c2031c4272231a4776fb2761fcfb5df7b61b. 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/QM24S1916458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e44a5e6a6128821a78ee519f8595d651d60c31be749e2539a67ff671bf81e38. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:37:45Z), 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/QM24S1923131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14507beb9415be359f7e0f5756a301bcdd7b9bc19b476a7184228c9fabfd7dc. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QM24S1923133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591b6b58de5a77c3a55ca4e7337e66ba70669b88d4840e9d273cfbb93b852f8b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QM24S1923136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1264b3250a83f13d57cfeee3732e7b05953bd404f463f86d5f107bbdfbdf8d. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QM24S1923137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20299c3e7557ad43ead328aebf015eeea43bbf322caa1b8510850cd3b3924d86. 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/QM24S1926076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2557bf081f81a92a26ddc40348f1516ed1aaf65cfc032a339deecacada34318. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QM24S1926316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9ace28d37802109b03fcd919ef12bd545c1185f5689c594af6dd56842af0b9. 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/GBPS83862831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89340819dff17d288819e7ad20d8bf04e0eae9d38c1494dba2651542f3358f1c. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QM24S2005929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a191439f8c2385137d5302df706180a5fd6ed92afcfc8f8c8b3255ebb57bb2. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:59:27Z), 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/QZFZ32169124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64764c7028025fa36b6e045a8334396a7fd455d4f4722452e791c629f6833652. 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/QZFZ32198172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86af6ea522f7004053683d958134f45b50e434457e2ce80f93a0182c4e810383. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:01:36Z), 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/AUMEV2137518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba73c0d70e1a1425a653dbf8e4efedae4cdc9b4444a9531f83a0852d65153775. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/AUMEV2136418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeff0ef9bf209abe569da17ab89851196cd117e15c1125cea5bf01e58c65f0c4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:32:10Z), 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/AUMEV2142803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5894e161fc177c4439c340d3b7ef5116636b8034b39c7c9968f21ec1efd8cca8. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/UKR6V2115560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5226d6dba0b9c446ea9c7e94d6d65ae0da9e3f46efebb04c4de0406d390e8f31. 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/DKRS42101301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b712026d207fc5a1e88934950ee850b58c5139c196284ea09f591924a9a0bd. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/DKRS42101302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0407d735cb2ae93c10081347a551afa6b43f10629be0f1b984dca29dc3a6234b. 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/DKRS42101305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c51566114dd453be332d20785085d638bed16bf28f42dc9d795c104bfc36ec. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DKRS42200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d191a4e76248dac0fdebf8fe0a5c988406a1a398ab5168ceb093b5afc7779b. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:11:01Z), 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/DKRS42200702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68e6e7087e46a5324e6b5a98b96032d25fee58498c5a74d30d4485ecdfb0bbb. 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/DKRS42200705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913ba67a423d9901f1a1f7165eacc7ceafa32b849e0b33867858e5b219bf8cfa. 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/NL4WT2200151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8b0e14000769fc487e2c2286fd34e8190cf992df4d83a27d940709ae1c9cc6. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/NL4WT2200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11eb8332492f1f522ce8d955e865133c09b78cef91182297b861e2707a52593. 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/NL4WT2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0b23c1dc2962f4257e71e53057124df3204fd673b336f419634b17bc56789b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL4WT2300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634b7e46aae0b00c2c8ebdbbf34cc1a0d11a27b16680a8015ba475ad407e0ce3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMBZ92373171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f04d55365d4c33313fffd4f5c16009044220a0135ecf05209e7ccf940b4d35. 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/QMBZ92373172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec24e4690b01afbbbc97fd01c54afb97f568c102ba32de857dcee8a17f2fa0d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMBZ92373173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd89070f757d4471059e943f2b6940d1dc1b38c9daf685d66a00d4ad2dc019d. 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/DKRS42324006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e04c0e7a1a510780c5800b19f60f4a5bf3a25460783e7b9eff80c5cea8a4e5. 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/DKRS42324001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd6a22a1e812154b50ecc810b0a4119198a1321b6c822ba69d174a37d27f6a9. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DKRS42324003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f825a5280260ef2d152a5e1903f32c357118f98319e1be54b84a712a7519e4. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/DKRS42324005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cffdad960bf3ac7da449d1147def6ba8481774876c8507f335bc28ae0d1d5c. 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/NL4WT2400235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf673ba484c301dfc8b9c6c4f644f8e61e254a03dab0c0a2847f6e45a9d3f66cb. 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/NL4WT2400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7e3d22a009cdbc772338bac10fb12ae0000e4f505f0265de218613bddb8c5b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:26:39Z), 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/NL4WT2400239.
sous les étoiles (Maple Sun Electronic Rework)