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 0x77d0a79dafe09112fc424f7c8fa73aedacc6d517b06beb0a5f2d5b5fd2a6478b. 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/4eb3b419-bbd8-4fac-912c-d3ed8c071915.json and https://artists.proofprofile.net/proofs/artist/4eb3b419-bbd8-4fac-912c-d3ed8c071915.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 0x637c2902e8b2713f834fea724a29ee462cc3287172f615ba99fd66cf3f72e5be. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USY871400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5f97aa6ecf22fead3f836850fe43f37d0bea264b0698c45faf3a52a40faae3. 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/USY871400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2183990954f16d391d6d9d4528e1fd11ef1f3172e1d495ab7f892453159e05. 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/USY871400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86700c8f53151ca2f6e707af4bc9d58b211ab90606cbb7c681b29f5a6011d9a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USY871400035.
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 0xb8c10388c88c3f726e408123aadf2548cae606e4fac3835fcc9bcc31ebf4c120. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USY871400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22556f9734ae5f624bd69b9fa16a46c06c863bfa0ae9821dc747b7713b0320e9. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USY871400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709aa50d3123444618525abf3f7f36aa1f412304dcd151a5b7aac570f363a95d. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USY871400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c1062fb4e321a317a12fc268606c93ee13f7ab698246838ea65ec99c306ee1. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USY871400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed3032f968d0bff23b61b818e4d35d10bf65c213fab6d9034a5780a54213aa7. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USY871400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25db0cdc75ebdb18357ab4b704de186b43f6965f7f04e525ed2c96543665ac81. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEB331548204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733c0057b796ced91d5fb8b48e289acc1495912dab3a80a5335a86342bc8a64b. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:09:10Z), 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/DEB331864102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd832a21976ac73e62de6811a9d22ecc6703f34341115433a33b5b4b92d5a3e7. 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/DEB331864105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba07822eb809c8c0a1042120b59547bf086bba429ad0f9cc6d1eb57f76cb7083. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/DEB331864106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da3fd718d79b48e8ac825045373d938df11d281b6f07791d1bdd9f882c18c8b. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/DEB331864108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445b67295909870936d47f0cb03a8adcc757f2aa86baaaeee83300a7ab7a0e1a. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:56:58Z), 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/DEB331968002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10776c6c6f1dcdec8fbdd4688d0721369867c36e9cd5a3db322dcc2e5a72c456. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/DEB331968003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47351ce59dbfb404c0e405580b55b98426c56d8865a676be43272e6ca412ea5f. 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/DEB331968008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196dd1ea52ba07269ca78e2ba1b96da4f4f1af810faa63558b73554f5df80fc8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEB331968010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea55405d226f1bb7529abc630f92bbeb88638ffb07bec142f6dc395e433a33d. 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/DEB331968011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea71f6481486c00816b1bbefcd643fb894b9c9ad512e79949d5a22844c89435d. 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/DEB332173703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb060ab70609eeb092070644b9f7bb412f35f7b09abd69ad1695dc42a510d19. 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/DEB332173707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4620af0df3996cc35225a53958e901f264531c1c69a1d4ce6d10af4d1f6e883. 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/DEB332382201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b7071685daf815920a5edcad6c3b8cda51146e474c093575a66d3b66d9941a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:33:56Z), 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/DEB332382204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aec56fcdc7a815f49504527a870cdae060984a8d1518f9f225f9795b8933c5e. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DEB332382205.
Adagio assai (from Ravel’s Piano Concerto in G Major)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0e6080a02c02dec62d137cf6bfcddb28d6a22e7d7cb2a213d31664155e40b0. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/DEB332382206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e67b1e8f48b7e5630820a03a29ea1067c62f1525de5b951413c848ff2f536c. 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/IL7112102785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580bba32b7d244377a09eecbacf22f4e2041bdea3096bee61493a7b45de62667. 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/IL1012000833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74667749340f58ce995af624cb29152eb74456e1801f84bb387288a5060df528. 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/USY870700118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a83709092f773a7dd721287e15c316ddfd572e8fe8dccd57bc4a25039edd99d. 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/USY870700120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdd17dd45cb1f927f0aff16ab63b65a460e871d3b3e232f79961fcaad8c5517. 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/USY870700121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4097b3368da6a55afe3e0da6e41c559fee9114a80f231b67572c0b4a4ae75df2. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/IL1042307006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7e08b0eff924d04ee4ce5da7d070176335734cb29e48ec5a7fd9bd4b7fddd4. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USY870700117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990009ff62a9b4c85d1d9012895bd1d79c7d8dd5b0b2f17ee8d921b37766bbb1. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USY870700119.