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 0xbc6f366684ff2d11fd46f586b52762094649f5f65d80ee99c4124ddbcb87ca1b. 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/367674c7-8270-42bb-8646-f61f34cb8546.json and https://artists.proofprofile.net/proofs/artist/367674c7-8270-42bb-8646-f61f34cb8546.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 0x3f07fee01f2420eaca396a9859a982c58ad1c3cb0d1dd07eea048f565440621e. 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/ARJ141600235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31959f23909f343f818dcc3d5aadf654a86dc57ac63ac4d039c175dd0a01dc00. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ARJ141800282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119fcb9e95dbaea3091daac599de65f9419f5e91536a28b9c4be1bf1bffa8ee0. 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/ARJ141800283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfcbec18a88965d460d1e44a42f5cc7892f7f2ab07761a09868232fac7dd43b. 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/ARJ141800284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe703fb20088f67564ef0cd4fcf9738bf279022fe3575a86e26ae61c4e74445e. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/ARJ141800285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78e9cdafaf1ce0bc30f7a8fae6ee5314400052885df1ca546c439715b3f3199. 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/ARJ141800286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9aae192bbbe89f5af900f1ce796618ea195c094d6745149212303ee723dc4d4. 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/ARJ141800287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605965934bab4efdef07f0bbcb414984db89105a42fb657a06505fd0869a1750. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/ARJ141800289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb886a42f80082852de19614ae05c21bec6ef1fe3131c9ce9dfae7dbcbbb6ad68. 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/ARJ141800290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daeb9609aa54b6db444f77d432ed178c89a9bbb5123d06ac617400e88a66a6f. 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/ARJ141800295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ccbeb9bcdb48a3100d11d5f9d65004626cacfe85735738ae51d0ad3fcd3ef9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ARJ141800296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfbfc5497523ab3b1a68f1b50c3002c054a152242575efedbd0825089ad5f74. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:03:10Z), 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/ARJ141800297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692f2c1f1b307d5a72fef8a7fe737b74e64d4aaf443062dd5d5ebe582bd9ee17. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/ARJ141800298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b399a61fdf71b7c6caa1053ce647092edfce70c05e485deca490a7b14f048e. 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/ARJ141800299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641df997f49b553b86f0ead36cba51564aa8091e8b7f75a1f399af116369ebbd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:13:33Z), 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/ARJ142000361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9960d0bd659e9f5171aab0d067f55d717dbe7117c56702f5eea65f633007f7. 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/ARJ142000366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b65e38d234163995edeb55a3c9d844c750b7a3a6e20a9b1b32f0b012398fcd8. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ARJ142000370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecb1aa5b3348b3fe091a33694abc09a904d738f7558d3adea0cab82bc3b044b. 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/ARJ142000375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2e9d99f61b8eda7f625fedb01b5a611f816d7a219adfc03b13096bb1b2affc. 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/ARRA22100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536ead83947f31a816ab4d1e4da3a70e3b3927cc02771f1a158ecfae1da0a1bb. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ARRA22100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536ead83947f31a816ab4d1e4da3a70e3b3927cc02771f1a158ecfae1da0a1bb. 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/ARRA22100003.
Dejando Huellas / Identidad / Mis Tiempos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709080b5cb97d8d9ad539be136ded75a2d8beb69c3ef6d5832fe62c6a03444e0. 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/ARRA22300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3895246e058bb50a874b3b993fdfae87a4ed5f4be5dd44db09cae84c8ef5073. 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/ARRA22300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06d8eaad6d50c57c5b63083f5659deaf7bc90298ebea98e91576ee9ad71acb8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ARRA22400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06d8eaad6d50c57c5b63083f5659deaf7bc90298ebea98e91576ee9ad71acb8. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:51:46Z), 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/ARRA22400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d3d3e542fff0a45a1cca7e23fe83a9cfa489b142ef3c6035b71033489b787e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ARRA22500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7453925a96f901df65a37070aca22bf8c413b08a54a88fe6c464ad056ba12363. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ARRA22500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb049ec3d732b3d49915c1305b2fd41f212daff524c7c8c2c18dbdd3d9b22d3. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ARRA22500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f572b1674fff52b8f433c1012e6236dd0afad1bd614933114f556003adc883a. 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/ARRA22500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291ade46a55996a62ea4d57d8ac4d996e605e3683cf002efdc478add0df35305. 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/ARHXW2200489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8275aefcf4359cab7681b09f1e5af96eb0e6c2b78542f5029a1dfbaf8aff695e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USX9P2454478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ec1b06573c5f5cb6724e4454ad20bd8e338e12f9bc6cfa85cc8ced06796f3d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AR9VI2100132.