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 0xdd3da0f6a248eff713487717c272574eb4301e9e70d6d433190ed9265e93ff39. 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/87b1e06e-a32c-43f0-a86b-34eee5284bab.json and https://artists.proofprofile.net/proofs/artist/87b1e06e-a32c-43f0-a86b-34eee5284bab.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 0x76a3ff98382b1e4371c532e416ec12919197d46549b7111e2dcd3fd1147f7b1f. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:31:58Z), 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/DEQ022111072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5070e3c47e852205b7713201027a042f2aea5d6d30f77b6abeb0c0c2617e89db. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DEQ022116494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3faccefbd65be1164eeb98c55629f3db78ce998a3097fa1877b466de5ed75e5c. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DEQ022111213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9acd291aa34cb40d34ce0b74f75be9949aedd4e53c2a52ffd712e9f9d939681. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/DEQ022116495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d98c0ec54d3adc8ee331121324fa295447975a14f41fe099e1ff263453387e. 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/DEQ022105326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22844f969a855d230139558e16c67708076929de11dbf17f53b537e8edb6d23f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEQ022280911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b33f15115c411fc5004950864ca4bd354c1f6630617d82adbbcf74734712c0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEQ022280862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce98e5f212671725bad4383831543c615a0376218cc13ebbad11c54222ac3505. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEQ022280913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211e45e6ad875642a45488ceecf39e0c91d80c499ebf2ab658b352d19258349d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEQ022280916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfd79d0158964b98c4fa5c4ee7599d9cafe55776aaa272ee5becfd447ff829f. 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/DEQ022280917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb41188a13b6c8ef34b25d0931e4620e7c09215354f2376b38093c577223cab. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEQ022280918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8c789b811af265a710056e38b9914023daad237d9730dadedc06ac624f4504. 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/DEQ022280919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec9a2398cb1be96293ccbf0ead98f7e4a6b785d93bc8d7e95010c25d79f0718. 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/DEQ022280921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0e642a37d92fd90d66959ad65572511a152daa54f87236ed440e91edb4804b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEQ022280923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079651104e2aa2a6c090dde6fcd24e5e0f49d7d7f474c766d596748f766cad81. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEQ022151461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e46e3742967e43d80bbf97958a4d50d92ec1c18e247e5c5da16a4ca63ad5bf. 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/DEQ022280912.
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 0x512d0468b4aeb12c7c11dde036f69c938f68cbb543ee56ec039e1965b8beaf01. 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/DEQ022270717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4607678f80b9802caa4988ad520cd4b9c2b8023e901dbbc5f2abd7198305198e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEQ022280914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b900216c98bc828bc885ae8afcad9d21d6840cee226e1b4b1611407fee6e01. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEQ022280915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40906289445fb4ea115a82bf11860fa8f6377159a14427fab7b971e645259109. 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/DEQ022280920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05eda0f3611a18da85ff213b0d1eb557a00bd37a7b2f51861eb7b366620b4ea. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEQ022280922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecd028835c6225a6f27c81a441e30fce822c55cd13d9a55a2d88bfb17197f89. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEQ022112301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d58105d5e67e00a164b73f218973c1e3cbea31bc43cc5a425fa9b998b53af3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEZC62497278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b86bbd3ead945595002a281e1630083646da3f49d90549d1c0396e9a48a45a8. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZMWW2418563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188058af86824abb898b79f18d3fde43990a9f9a25626d5f64ee451752632bb4. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZMWW2418564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3537a1a1d6a64f83b9c8147423e560e5f3236a388e63d71785cc406492e025. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZMWW2418565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d58105d5e67e00a164b73f218973c1e3cbea31bc43cc5a425fa9b998b53af3. 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/DEZC62497278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f54a4810fe8486e469a875f14b56c295e21318b3a335ff0b0b55f4273c21991. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZMWW2418566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7ce890004e140342122fd97bda4747e6496eb9c24e5e61c78c35d5b2044daa. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEZC62404807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c34197ed49ca330ee44b2bab22456722cd122ea63ed2dbbabe889ec164d068. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZMWW2418567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34661d8010ee1774b6dfb51f97829a9a926912dfba66451bccf1971b7f4cd54a. 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/QZMWW2418568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5dcb0423f4ca1eb592e6c10534af24e95fd9fcd860521edca39d3b7ed8292e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZMWW2418569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6362bb544cf43f13557b797e4fc1a1f99a11cc21597b756cd634ccd3f7e5d0dc. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T08:00:32Z), 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/QZMWW2418570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4398e17cb69c62e2c3e750f3590c75506a30c2eee52b09e85be9ab09b6dfb51. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:46:18Z), 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/QZMWW2418571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0cabbcfb686fd1531566c87de44dd3a8f03f23fba444d217b0cee3181c083e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZMWW2418572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8614bc4e9386bfa0dcb747dd4f94073eb1f72c5f0954f6a1b9d10d576935d63. 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/DEZC62404332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2e6f07b39bd2639296a877be1291dc69d73bc81bc4b3ddc2df057a4b955963. 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/DEQ022116396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2acb48e4be26bd43135ba979c95753c40a740afc2b9f4c05f417e9a17b0ef1. 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/DEQ022105346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda59fcb07a7477dde91e76347021722fbf0adc5cbc8b0fc3da6346c44e1d8e08. 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/QZMEN2328315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5506a289b233babb439c0ee80f81ccc5760e03d382ddde48d5037e638cd23e69. 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/QZDA72513342.