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 0x9f8fb2dca314e66660f602cd5b69f46d2d9082cf93fb4fb2736154ed388847d6. 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/6e212589-4c8b-4161-a3e2-22f276d08a4a.json and https://artists.proofprofile.net/proofs/artist/6e212589-4c8b-4161-a3e2-22f276d08a4a.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 0x8da2176193e3e5497e01a3d45e385fc2528ee811ecc36140079e81b6ba4edd16. 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/LBA131801523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb713b356b27030c29a0c073168d5ba3e115067f7210ab882110f42378d567089. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:07:18Z), 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/LBA131801527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ff73d4c1c624f5c582cb18a90bf4569d92d613b34cf78b8a981cb4bcd6975d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/LBA131801531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d5e578f5ea03089576708c1a04354fa51f3de112ed721e10eaa57a608c6f0f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:51:29Z), 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/LBA131801533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c85bace6d4cbef8d7c2dfab7c96d374edd046d2b9a3add429e1ba63e5a45bae. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/LBA131600199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6367835f8c4168136eac6cd9b1cf558fd84d43370e6e58fcd19ec4457ec728bb. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:32:24Z), 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/LBA131801490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eec8fe6b63efe1ff0e38945fac7b3d666ebf635ad497e1329049c9da3abc34e. 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/LBA131801492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf90678b56f89eaa9b7feb0d0ca8ae305f6d8de457c1db06fa367630a4d3775. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/LBA131801498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d6591c40b28b78a575794333a31f218558b0a0c2d60e958328262e3602edf9. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/LBA131801539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab40086184b630019ed1c43b7004f6d4d79755e45f28b190e4c7493f0972cec. 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/AEA041001096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efb6b82224b7cc8c7843aa9c4eafebf31dd00339d7b1291b0b6757bf861758a. 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/AEA041001100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb774d91c07be5f19698b4c2a296a2fb712459cf2c940ccd4e6ce700428e0280a. 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/AEA041001094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10066b5dd0cd3f9d8db58d56bfb21cb4be24a0633dbd253492354689e5e1a860. 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/FR2X42044214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a92e3b92ab66642a912119b84da0f2568f367c9ff9f70d059f50fff461fcc4. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:10:56Z), 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/FR2X42044218.