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 0xd8a02f42aace6072c386ee98ec2917ac6b50a6ac6d62b52c5a6b43d53940d9da. 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/2e369886-a3fc-4524-98b9-71300411ba8c.json and https://artists.proofprofile.net/proofs/artist/2e369886-a3fc-4524-98b9-71300411ba8c.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 0x7430919e2cb9790309e311655983ee10ed75852b1714a2751a23b9dc1192140a. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAIU2468933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7f20d08a0a7e3f16d53e7350488dea582ac83fab53151b98775e28e8a7254e. 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/TCAIW2430328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b97d610dd9bf4c28416c60bf54c43850ca0fe5f283efc60d907a0fe2bd3e8f. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAIW2462511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f6c4b40c9377eb7720b98b0e1c50469bfe26f9ffee6e592a30d90d260b7832. 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/TCAIW2462521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e596a5ad57669870cbc455d3eb9eaa8158938bfe8fc4d0784b815cdeb6c1ae. 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/TCAIW2481397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7ddeef10c910278edf2c74b93b0acc7e78d179bda61c5dde9a9910ec1dd892. 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/TCAIW2487169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae158adfbf02816abc6f3657a8d293c69d8efbb5f50aa8dca2aace1534f3853f. 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/TCAIW2487192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c3566270cc8de209a7962e60565427c69d30daddacdc3efbf1f3caf0af8fda. 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/TCAJA2431911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fa51afdc7976c73f1a6f3aed88d320cd3a5228199c07bd25d52b4bfdcd4116. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:42:33Z), 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/TCAJB2431928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2725da48588fc1878ff4b5199ac3ff7888d489bc1fe858a45c49ea6180a8c3cf. 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/TCAJA2431944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0132d8e40774e19c3d289299c92f69075798f7c044c675e4f953e8d00e4d278. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAJA2431987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7adbf44c7fe6dc5073659b92f9855ae4a5fe3808b7a53114f70738f6c8d438. 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/TCAJB2431997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d699d6bd91b325102a14aed71ce2cd503233ced07633c18dc35a934d57f5e32. 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/TCAJB2432000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66597f15945373da6a0b657295cff89ac7b688233784fc7252b40247930862ef. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:32:00Z), 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/TCAJA2432147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eeda3b1632d94b5376737e3c2404ba91034d9d2614a6f1e9802a22af9c62936. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T18:51:58Z), 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/TCAJA2432152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c2f469c5364ce64802eb020994ee85738d57077f33277748004c3048dcb7f8. 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/TCAJB2464372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee35d2081017227b8b3738145d3651f5548c3a7a6ce5df4733e33f3503506335. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:38:01Z), 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/TCAJB2483048.