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 0x89bf5f7f0e974b2deff257657764d70da6b5c4aef63e90584f7491538ba97c16. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26fcf620-8d00-49cf-9e45-bf276c4f0fbc.json and https://artists.proofprofile.net/proofs/artist/26fcf620-8d00-49cf-9e45-bf276c4f0fbc.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 0x87df01a82578007f05cfbc5d5973ca5e19cec6e72b9e5a9957c8bb25333e709e. 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/TCAJJ2500211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90410653c9f75396491f7b28db904b37db50875103df6c13947c5f64ea7c7dc. 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/TCAJJ2500290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04e2ce052e07f2274dd457251c206f53a486e28238570eda5916252731f2163. 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/TCAJJ2509237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c680361a03821133aa06e2c3ae238f18d2a34a5f79418f830d824f39efb0fe. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAJK2509279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669093a9f5530a4f76c2b9bf279ceb7ee86cc9e1be2cdfc3aace32be712506f4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:29:39Z), 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/TCAJJ2509332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe41d9eba4bf9d571ab18f630bcbdabd53c7dc7aa649df396b1f2091fb0cf05. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAJJ2509352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b45377ee8b93d79a2a67c4e21c7e28c6776bb5f22d85f61f8a294e30ffbbb7. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAJJ2509366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf2e33ef482c0d0672f4485f19f471db1697ca6fafc3c6ebe4757b17dc1f0b4. 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/TCAJJ2509374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6551f13a2ca040d6ad279a7785025a3983c871c974f8076fa5368b0e58c3d3fe. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/TCAJJ2509384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3384165238a839c10c6ddfd2ca43a7674bad237a8cd9a5e4b8ce658f702c00c8. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/TCAJJ2509392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bebc65af9a90615090c018cecebba4a675fd80209f385d121fadad0fd86a7f. 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/TCAJJ2509400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152ee4f01a55bd63ce0a4395b3bbc074b2c8157e05660d0a77496d512b5f0857. 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/TCAJJ2509419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06621e63511b9b01817673d72be238907f8fb43f1d77a606187c23c2518b7d1. 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/TCAJJ2509437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4ba4af5f4469a72efd95424aace0e37db189b99934f028d7f995b618caf3ef. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAJJ2509474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463942a047326154b64225c286f93f26841f5a222f3856a1a698421ad445d9c7. 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/TCAJK2509490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ca3f719827cc948cd59afa46da308fc2540127a1abcce79f739f994e8ad819. 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/TCAJJ2509496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc2df0885cee40d9824c21dc7448323fc4be4017fde2d73dc12be9ad6c5566f. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCAJJ2509499.