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 0xc49e604cc2dc03242ae6e343f6690f3f370dc367d478e7d2850d2c23fde34bab. 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/375c9066-17ce-4ec9-bebe-a5c8fa7561bb.json and https://artists.proofprofile.net/proofs/artist/375c9066-17ce-4ec9-bebe-a5c8fa7561bb.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 0xac670daa6c067f2a99a6c4e6bca2a336c6b0c588b6736cea478f074e07a33a08. 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/BC3PG2205793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0142fcfb35782b652cb42c816a8fc9abc4bc7342778e443238bd3a223612b036. 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/BC3PG2303400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b434d413d67620634e0c9a944c5cb2ef503cd63167c3aacc49524d952c52a7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BC3PG2206173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cf71ff21a555e43580260af020e84e00ce9cda6659fae3113b37d0841e1d80. 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/BRRGE2200673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6603a89b04537eeddc1aacc4bf01af1cd22dc1b12cf7fb58ac8f8de2480dd35d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCENK2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045e067f0cf0d148d6eec88f155a32dc6564406cbb1a6a1c7796517b9f53d8dd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCENK2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb452c7587b63bd2f9b40ba3be56d82a8674d5b691a73ef0726e0c843e1d6c048. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCENK2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda133e694e38afda559f4df8c298c9fc43e58691a86f6db623ad2adfb4b42afc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCENK2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646710ebc3c46f7625a38625444d4bab56ffe9146c6b8638e3821aff71d6ae6f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCENK2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fd012f98e89398ec95af19aab52c62837657d6b8b5a3825fc21007a79fc868. 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/BCENK2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb738c7ceb6efa0bf3024ceea01b2f3cd9327b54a9c69dc76373e25ffe0b850fa. 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/BXJK02200153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14765b7f808aaa55f8318846ee17e197773adcc32b891f21ee940cdc91d01891. 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/BXJK02200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadac2552c492787503a80c7c15b511ce319c34995eabd8aa75ba2f461043cfc8. 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/BC3PG2205169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8878f849a897d04788e4046cf53fb39bfb383871ff8ba0b4a4546dacb0522c. 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/BXJK02200119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2303ff90452572a70be875fb01967f4deb596453783f34350e81195ff63cf9. 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/BCENK2200097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb9d0cbfe104849ce85fe81e708b52aad8af7d8f167e17c41ad778dbf695f59. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCENK2200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced905a36cbd158c6b0ed030c8b3c9d94be0c956221787dd0e8b6ead8c41bba0. 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/BCENK2200093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bba7836c1da4237d8516c9902286d5c4f4e6174a53ee5012d31babe77f12c9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCENK2200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcc0dd312aa7a5a73d9138c1dd28f18cf0f57841b85bcbdad055d606322de6d. 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/BC3PG2303402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b37e8260f7bfe55294900e5a3efb246439a52b24d21521e8c04ed02f36d148. 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/BCENK2200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac8fbceb9be9216b65851e50c31c0c9223ddc4bd61b415aaebc6f2daa2b356d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCENK2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361e1395b1278d53086f914409f0456d20d5d1bdfc7ebfd996dd726299d2d1b6. 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/BCENK2200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e9178485adb45a92f750d1b4d6fbeaaa4f31cfdd8bec3db1333fd698647f1a. 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/BCENK2100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d38594e207207b7bdd47aa9db631507251a11eba2d8258d69b4b50de40e8a78. 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/BCENK2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a81295a34bbef7064c82cf268ad53d24787452b319f257a820048e1284640c6. 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/BCENK2200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ea2a68af8cd3f649a5af2e417a057dded8491638e86d03cb45978e1afa8859. 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/BCENK2200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2cb0e41def779785047f843ae995505089caea688c9ecc8eb1c70076c63020. 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/BCENK2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38e81836237062cd9631c834a5b2b7d0236e526cd5e29693278019657aa4cac. 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/BCENK2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514bed6ac875adab58f611983a3bda9093919c2fd4bae72659f9bfe4c25aede9. 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/BCENK2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bcf2589a8f7551f2e5a042cb65d85224a5bfe4cbe538aadfd980c53b6bec33. 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/BCENK2000031.