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 0xa9d2fd3995cb6ba363d8242f76b2f78bed7a2e7030fb7d0ef9730b4058c7a3a1. 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/894bcf31-85bb-4208-81c5-2c6ce275db37.json and https://artists.proofprofile.net/proofs/artist/894bcf31-85bb-4208-81c5-2c6ce275db37.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 0xb92cdc0edc33d8c3fd4c931dcfb54f91bdc49c1d059d24b2aa409e665eb1f998. 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/QZK6M2383113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb886b99758d152ab010eae5e3e3c7e9d077f9ca763c3b03a21700b0032218f0. 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/QZK6K2337240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aaaed229ba49ba9b3cf7fe76cc0888d5e6504d57cc577f8aec232be18039fe5. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZTB32440834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3da3d6ee6a357bcebe799b06a11dbc81f2040b9fe85a51fe713cb49d09d3d55. 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/QZWFU2446936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1dfdfd976b56c467a66326ff3a312798254db7ad3e713d904e9bee4e802116. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZWFU2446942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0856313dc4e9ccd29404ae33ca6803d7bc498e9283d11624fd2a30b80d732213. 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/QZZ792426722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce98bdd9d624548447feafc3978351bb0c689dc0fdfa3150b75c66b9ba19a790. 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/QZHN62581281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce98bdd9d624548447feafc3978351bb0c689dc0fdfa3150b75c66b9ba19a790. 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/QZHN62581281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284b911ec3d4d463f17b5da6331ea6e98ebe176d135d6194dc94a628c11dbbbf. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:27:58Z), 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/QZNWV2543531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d054e1fb4046ffa9fc725d4de4f537b444c0934cedcd09c473a57c92586891. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:56:08Z), 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/QZTAS2533185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5203eb5b4cb2a9fb3e13c90bca1105ca5178af5c8834dd8de3750acb7cb7c38e. 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/QZTAT2599668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20afbe9f65cdec55364de81a69e2636a1f05646d9baa5694d2bb10435174f910. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTB52579030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc06ac4d17b4291dbf05446ee4f46c71d11872a63549bde46cdd30adb1e1b5e3. 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/QZTBB2546458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6883b230f44c4ef49e7f5a7b480ea48252ff8bd0c77ee3dd6080ebcb7990e40. 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/QZTBB2546459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f6c402bb5807f1abe1e9db86904c646fabad3f7f9914d5eb3df5fde9d95da5. 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/QZTBB2546460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e2d69ca0ce3a6054e624e1fddbe5505c5f116429d44e31ab7739632d663992. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTBB2546461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b9b45665869983f690c265b7c2d362df9bc7e690365c311f13dd6d0cc15867. 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/QZTBB2546462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10d32afc41735f80ec2fdd19dcb389f8a5edf2e0e5f0b17f6a2ec7e5d49a282. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTBB2546463.