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 0x8f07133a316225c1746e4e3251996edf571adc3a13c015bb7e879dc04414aeec. 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/a3f332b0-5d45-482c-ae7b-2c0f00118bd5.json and https://artists.proofprofile.net/proofs/artist/a3f332b0-5d45-482c-ae7b-2c0f00118bd5.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 0x5aac914b4fbfb8efe487a2d2e34eee2fde04512e3560002c1410ea4f9864898d. 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/USHM81134859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42e077121c5c7f4fc4e336c38fb0ab0b1b35fbe0b117bd90d8592802d6e2f3e. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USHM81134874.
Children's Dances of Terra del Zur, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823d8062d70631f1ec0a105d873014af55656b20c58d83fea78eac12d065e57a. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/USHM81134900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f662c04d961354f9fc3656f37f230de1ba2de381dea7ace8fc61650bbf6fdb. 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/USHM81134904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865397eb527c61dbc90e2cd0aa3219beada0510bba6d7e8b2771944cdb5f26ba. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:38:29Z), 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/USHM81134906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255cff2d8fe92551c0ead8113d3df8d868086ad1344c99762afd6a28283e8ab5. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USHM81134805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11458eab09fa33f4bdca0310b585c4d36f93a28444a0adef6eff8a15072b28fa. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:30:44Z), 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/USHM81134809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2ecaed705e04c69584eb4b7b4f7a9134bd8565cdc6d039eea66221d9b53f1e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM81134811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4338313fa295be8c99fac114bac9980a0c1d469075eb50c5bae9249763a7a1b6. 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/USHM81134813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6681bd3971618d1933c851580608afdf51a6cd29957f7e145410a497d8db9f92. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USHM81134815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0a5a8689ee798a4ee9feea0c0155f972284aca40eac136866d4f12313c3745. 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/USHM81134816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be43015af1211ed3cfdddf71071f7cf4b6605b92f1708e3bc3fb708ced05ddd. 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/USHM81134852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36ec4da1a88066f43020a799d4ed9a5456a433cef801ee6035fc36ad4f1517e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USHM81134840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a90aa3f95a8a11913f9d04fe512b342653d7f64e7e5228683538b755ce2fc93. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM81134818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd8ea7b5b05f14a17a837ddf64314ca2dfc39288c629be4cba20af98903f7db. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM81134924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc966d1bc9a482cd71241652d1aa1abd3a3e216797b4ff10ba4da6dcd225e1de5. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USHM80974140.