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 0x5e74bdd2b6ead4c62ede7d620308949931f98da3be10cc67ec01d210348a2a62. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcdbdc9e-d492-4be4-a92d-3f02470bcccd.json and https://artists.proofprofile.net/proofs/artist/bcdbdc9e-d492-4be4-a92d-3f02470bcccd.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 0xb3ad0b2092e2ac0c6c894bf4daa88b448673e2f52fcd5ddc5512070f07c0ff16. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GB8KE2201554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709e667695690aaf0c91211a9fa401e538d9dcd37d33f169c5a0572e9cc2f90f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZS642163479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c02918277fca6b45148d626af3723287733f05fc7317502b87b24501b54fdeb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX38U2147266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f784737007aac43a4b4482e9499a6a6d2bd6b4067b6682588f5ca6576611f95. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKQU2125227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc475066cf06182281b38457bec7696719efffabb997c663361471d1310851359. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAEY2087683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d3be9f5c807583c74f4cc9b310c907d6c91633a0a4d47092ed84d321783224. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAFQ2129635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d447f1a2bd44eb5d4a18c3b5731b0e6fee389b1c7203fd86407e0cf3a4ef64. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAFQ2129638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023aaf7bd638fcb5d7fe975e1cffc40cdab0504f037d4b01f389bc5b700e2576. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAFQ2129642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b83a893700394b9ea6fdcd0eb131d3a402f37f7dac1eebe8cbc280629fbccd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAFQ2129643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd44f5a1ba2bd1dad11336924ead5b1d7531f787af43f56efad78a9f28aacffb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAFQ2129645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed6a58b2f6758d3f08e0eb5e8e28715c0dfab5dbbeb12781e7237f373e1f96e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAFQ2129653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1d3b529d68d6dc0b0e0929600a8359d41547acdfeb5c5884363ae7699ee2e5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAFQ2129658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6cc7ea08827f5693e632e51a9f7b8f07e4ad150b949f5c58ac0e9f55f1efb6. 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/TCAFQ2129662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf2cbd2c0211442b43aa96258da4055a764a76db6f7a5fb145c975af828fd53. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAFQ2129667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1398dc0c46a731f2d0bcb83e53c32129dd1eed46a903ac459bbeac95a7609a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAFQ2129670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eac5773afe086b63a2460634c3ffa0f9618bba1ed289c9864cefb1493daad6c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAFQ2129684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7792afd736c89074f9dac1b1847a358e774a5aa0c33dc085f180d946cd500e47. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAFQ2129690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149e47d880bfe13839d1434be5d2a2d1a2ed64d3031e4ff5cb38bcdc6d729bf2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAFQ2129703.