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 0x558b35497c45f3b0982c6c88fa68f0a9b44ed0c43e8664ca6edf78c5dcffcb37. 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/6dbc03a0-2cb1-4cf9-b7ad-2496b3506cb5.json and https://artists.proofprofile.net/proofs/artist/6dbc03a0-2cb1-4cf9-b7ad-2496b3506cb5.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 0x90a9427b3e7d4ab491b5595669d30064dd4c80d78713678ce404145db2113c5f. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:23:05Z), 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/QZMEQ2413077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ccaf46e0c187280ed36fe68705d18f37267cc71f32bf9facee4306fa1e9115. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:38Z), 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/CAGOO2492987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434568cb48e0086fae3a3f360b60f9dd60c44c19c737ba77029304110ede5423. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:49:03Z), 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/CAGOO2488803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd30c63420aab39c6cdb3e65e31db95afa6dbb6b1c825548c028f5cb68242ae3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CALVP2415456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4ba3ca6cbeea5a7c8f5fba1cb4d76ca0b124a54e16008d8ebb0eefbd1d142a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CBEYJ2428795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58742bfe252441497f3c43d2ba535b67e20ca025f5e4cd718eeb528951f88ba8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:46:44Z), 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/CBEYJ2449773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3f56f3c2cb39f33b35db9cfe80df3d73337e89cbec3eb193a49d2cf7181a90. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CAHQJ2553703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3966bd2a71f7d653d905afb323ae55e4813eee805cf3a66df70595364c5b31. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAHQJ2572416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711ae34ad9c4ab04b2f8c6d64b5d606d321417aff94dc467b9f28e5b7be861c9. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/CAHQJ2588770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816f1476f068910e1b7c5ec3814a4cf3251070212cb1ccf2f8a3c922fd679440. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:33:08Z), 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/CACWV2525202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd21d77533038ff9b89a2d87a2a175a863a9a676246cb9ef9545a4ade40ad0ce. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CACWV2527347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66973d9b6594ef76d3fa4d09c74bc1a05188df7bf48bb41c6122c90471557d44. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:00:30Z), 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/CACWV2548004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb6115ef97787bef87d88d865a5176e4199eee0431cfe21e8abad4ad111abba. 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/CAENV2508283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bd7b19487d813ab7a9ce453de2edf104b05799cc93c221e7be0bde655c9505. 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/CAGOO2554116.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e4e90403385b843f0f3606e30f8477ee32d9f4a9571eea4ac91cb3ee6beca7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T09:09:21Z), 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/CALVP2532195.