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 0x8bb4c412303649ac820a4ff1f6b82e3b24c980508196e75ec4b39d9068ba867a. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67446ca3-7ced-465a-953b-13a6bfb5fbc6.json and https://artists.proofprofile.net/proofs/artist/67446ca3-7ced-465a-953b-13a6bfb5fbc6.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 0x527d12deb45e010a5ca0f6bbdcc6a69ee50f843850e8479cbe582d824870a841. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWFU2589593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e658d5aca39ebf5d66eca01950487d1debf1521406fdba35d8fb4663379b60. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFU2589594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e945f5d73dc0cc6bfd424e315957860bb872e02d7b24dfaf41d75e77147f683. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWFU2589595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176537e6d5de51be12b6c308fd86ad5655fa08f3ec366631c96d5b9ed7c101d6. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFU2589596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652e3fe8fcf12001be6ce8c6e762422314afd6d55bb9e5fa2a4eb402847c861b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFU2589597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf261b7d8d2efc4c4e2724d50cb57434ea945e1e770f5f40f81e9f7b707e3f9dd. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:18:07Z), 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/QZWFU2589598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a91308d371b6f70c3436585c6a079ca104184f62f12ed21e08af581588b87a9. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFU2589599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66f6000c4ade29ab9d92d33f54bc3ca1965b8f42ff23e744653f49bf4eb446d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFU2589600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682f358e73268d7338d75aa4f1db94b450680dcb91341f5aa9d5d8a57efd1fc9. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:33:10Z), 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/QZWFU2589601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d1b13970c4b4d3ed9646ed8e22ea4fd209cadbebb784ec660392f2883a2e92. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFU2589602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ace4f510a1d996f00be740fa8bc40ce70f089dd7e13113f41da4a1d799f0436. 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/QZWFU2589603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac4983d33114cf6b728cd4f9cbde90b4541012d47e604581ec2ddd4dbbbf56f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:10:21Z), 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/QZWFU2589604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3f245735a1363dc9912a5e00ce3c2cec42182532e4d7f1abecf460c1f7cd1e. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFU2589605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395e45ad6e1cfed93839eddb3d34cdbf1e9c2e6c95f3150aba0874ae0eb77eec. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:03:48Z), 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/QZWFU2589606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aadbd8f290d62d5c6cf59fac824e61656434bd2066ad467105277c325e2e23e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:35:26Z), 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/QZWFU2589607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79fd673c2d1bfc91187a2b0ed1ddbc0cf5dd01c6d678520fcca379a053d5ff1. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TCAJK2526971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a9fafea38d2a93a5e2c8a7970239bc6f2df5219cc5560f67500d689b593102. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:25:57Z), 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/TCAJK2526973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca99048c943ce0b1a4b5c226439240677d3387108ab02f09cd9615bc4d02f27. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAJL2526979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1831ac7c7044768c3001bf5270b1c12753bbe6b093c64ff90fb801dede7a1a0. 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/TCAJK2526984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe94f5f8e06ba20d95f01a6f7fbc7655a224d74691eb6fd75310bbe56beb664e. 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/TCAJK2527002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a7f881aadc4a64b5e788a91d82e60f19724dba27d799dd6ec895154e02de3e. 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/TCAJK2527008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc070d42abf71befbbb691837dec1d834928b2a38fe771afd3af5ee0e0ad901. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAJK2527013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76071ccb04fdeb7e65f3cc5c08b63d3177ecdb8c9334c4632cda5fac6e287c6b. 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/TCAJK2527016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b5e9919aeea92e12df63b7da225b95fa48f7868222e85ac7a69abaf6603b15. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:06:29Z), 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/TCAJK2527020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac430bec1da371d4a00a2e2171c3ad9a50c22f6748a84aa51a796f6dce10ac6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAJK2527023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce397922b0da73bfbff5a1f98dc7a18f8d35c3a17812648060d53f4a4ca03cb0. 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/TCAJK2527031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ec57f46252c4856f93cfb6e5b640f06f2a51e1599646f952430b492ef9830f. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAJK2527108.