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 0xdc3e7570d43d12b3e25c949818903a21c77d8e4d4c983d7ab9ffba6f33c17301. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30b23737-bc00-4f07-a4ed-172323ab569b.json and https://artists.proofprofile.net/proofs/artist/30b23737-bc00-4f07-a4ed-172323ab569b.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 0xf5bf5100a0ed6fedbf64870ab6bec0ab4f87a4ea4bb905195e38c83a362fe66d. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/QZWFR2338579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0f23fdbcb2455e308891dd5c403143f1bccf05e0eb9785d68d7d8e0f46b438. 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/GBMA22414642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a3994adb08d1a6e80a663d73e0a8b8193094ee6580d4f133a8b3ad7ec260d7. 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/QZFZ22468203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7785f761fdbdc85e7fd1acff7297a1e3583819304900386df193aa4588e48cc6. 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/QZFZ22468207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a971360019b48aa14816eff5b6fea7c12b005dda56e989a5053f1e9636dcab4. 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/QZFZ22468208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32171a138edd6750a517df4a1586d987c4bd108e35c3eb15a5d8d7cb8656b70d. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:21:03Z), 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/GBMA22357098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90b9f30fd921966d174d9e1952cffeda34695d5584457f359404729e8b5b98f. 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/GBMA22360056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c752ab9ef6ebb474d2db693b1347fdbf646a594b5b7484bf275a667cc6bdb32. 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/GBMA22359880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c748b134d8e8c61383fa8e008e066130e5bf44b79eb1bee3ba2dea54bcbf5a. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/GBMA22361749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518a76cbeb90307e21a19f3664c47caea0c2adde6af26d4a651e2cd8c4ad269c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBMA22376864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5ca32cdc7d8fe4c21afea7ef38669e13ba84acc26fbcca5889d5232e30fab1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:15:39Z), 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/GBMA22377127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd610544cc3c0b1dafcc7d8b4f8b5946084e024373961b80b96d014f36933b5cd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBMA22376003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acfaa41fd3ee5bd6bec308521e448aa1b90c2de18e472a1820f86f045676570. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:57:53Z), 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/GBMA22377118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a33e238d1d8ec50ab0e496db4e9f1f5483208b303bc6e15a3ff9691c3ad622e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBMA22377115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43fe26896732fc4ac553a0599e0ea381d3ad3a69d4932488888dcb81f6e687d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBMA22377724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c77fdccb05411ecadacabe4729808ce0ff92e20ad78ac40c077c6ff39990733. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/GX53U2418915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6602411da3448b7dcd94feb3cc3b130179e7af5c3a54581a9b223ef815fbb1d4. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GX53U2418840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9a09f994c3a83ed6d52d8f3801917d68b0e34f8404bb7fea62942c61ebf783. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX53U2418911.