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 0xbc4b1b5d74419cffac1cf2e35a6112eb3a46436ab145e3851c6825f65d4afe84. 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/3a56d1e5-e4a6-461d-a88d-983b17785c43.json and https://artists.proofprofile.net/proofs/artist/3a56d1e5-e4a6-461d-a88d-983b17785c43.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 0x8feec3c974c5f7f0eaa4e3ce3eff62a5a4f2ec9ff3456c9848dfd119edb3c6b4. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/TCAII2441755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61712d0f7d71047fc033075a563247833d25a98e7d51beccd3520f909232b45b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:36:21Z), 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/TCAII2441785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe780a0e3c087993dd02565451ba083ab3e463ed5a5c9b720ba33edb72e46e0. 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/TCAII2441788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e639af6f92a1df6b30ba7b43c6a2909306a5def93bea4b62e09402f255f7bd4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAII2441795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f8a6f3c7ff18575a60cb701a311901d60e5ad314df6883068ce85283fe6ba5. 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/TCAIJ2441808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf170f47a3a5ea2dde34e15757767391578fec14169a5a333d4af86637b75fadb. 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/TCAII2441812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabb57bbc3dd10c1662b65fb0aba8ac146d4c6e7556b1d54bb3718bb596e0e25. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAIJ2441817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c63640dcbead1a02720c2ae38665d794240acf902e4b23587c8ccdfff3d6ab. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAIJ2441832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca012d60ddc56b87751dddb586bc6a0b7187f2316da63163e56f2593e59e025. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAII2441841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e0976bb39482075a6e01f4cf691fce13f07c59c69c4233c532c8fc48d3574d. 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/TCAIJ2441856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3031d038b8c297d89c0270c50edcb62130364976cc2df35bb018523bb1758491. 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/TCAIJ2441867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5a12c4a0c1b1e05a2db413a71d5ed3c009689d5bd40400cdbe2799a3c95890. 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/TCAIJ2441889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708d3d06e51d5c364c5229498ea7843db5361373e51dde5e7c517a28769d9323. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:06:18Z), 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/TCAII2441900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b20fe7ca425a507eb542b077614c88a3c89c91ffa492ee2028337906574011. 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/TCAII2441911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18046938f46f5134e4d20942d322dd46c1d6cc2fdb44642c993ae53a802d46cd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAIJ2441914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec212ea882c3152c6733cc0d10dcdf5f6661b9c4148a910ed147b0fdcde13087. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAII2442056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24d9bdb5bad2188296c5a9b48623a67463519cb77c677d015d3aad3805b58c5. 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/TCAIJ2442071.