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 0x5972a865d2ed2bfc0a94d690b222e3a6dd672a5424e8ee7020a2832c3dcdc986. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3bfe7d6a-6da9-4f9d-908e-ed4596169820.json and https://artists.proofprofile.net/proofs/artist/3bfe7d6a-6da9-4f9d-908e-ed4596169820.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 0x94fadc4ce39551ac088b9805fab77e619955f4b34f7ff96a5e965561a9306247. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZHN92064845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e715d286c68d3241200138d4eb017362a4066a751f95e9c749fa00724a6bcfb. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:59:50Z), 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/QZNWU2096659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b5ed70148ce4bc4f3ed300ae831ceb83f59423ccc9d26a7f543c2598e8fd72. 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/QZNWU2096663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3f19b21a64c32122941ca3f7c5eff567e81f3eada8f3d610b247faa1cc2602. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZTB82253234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2faf00a031ac0f9a9ed1a9d831c381c8849d4b71716e97ca7489b4ab2ab626. 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/QZES82426660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495bb7977976a47b7fa3eb1ec6a18e9d1ed4b6f84c994d5aa99bde1dec132ccf. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEYX82214925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38dcb7430de7111711e25ae4b6b1c6d4b711d24982eb55631344174dcc08747. 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/DEYX82214924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72aaaa75b55c874a35ceefcb524f01cd432f697246e422e9fe2e63822d6a524. 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/QZES82452444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3dd89d4da3b1a5857d74d9f4de4b7e10c2da109ce4cb6602551e253c2ce04c. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:26:40Z), 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/DEYX82214927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dc832edd85155e69a52bbfeb6a4c74347ac2bf686d0ce786ec4a7fef606051. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEYX82214932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae50d78c74e4dcf78380fb0443d71952977d2100ed3374a02156f94d5acecb92. 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/QZPLS2408626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace6a2a5e7b74a1d663d2c3b4ca0c8e9cbea3035bf496cda569752058b3084f7. 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/DEYX82214930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b803145391739cf2917c7fed4ddfc6ff8677d9dedc9df03e386874e78918fc. 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/DEYX82214926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b9c052c6d7b80e67f76f5a1394c29b8471ac57df40c10d3ad40cd01034d884. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEYX82214931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18574db11af16b53387f54b12b8f249037d6fe186b00fadafd5d3bdde053e621. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZPLR2574290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8e68229fd33e2f84cf396315e0ebcdefab902e448196a53c5243068d651879. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:13:46Z), 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/QZPLR2574298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c9c108efc22cd9c8a3434d3e6491da2c7b39d10fcb2fbc9b6ff0ff6d706a5a. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZTB62574071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8052b6d2ca16e8dca2e1c9d8d3beafc4f659f8ef13b45eb03eb395d72512d11. 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/QZTBF2523362.