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 0x1f9b54f806e1c9396de97ff2b553448adb63dace38fbd5ec4f20e0a312f13c12. 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/a26d2399-b89b-4a92-8c18-9ee4ba392adf.json and https://artists.proofprofile.net/proofs/artist/a26d2399-b89b-4a92-8c18-9ee4ba392adf.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 0x8a59cbb01ec6eeae867e85c5dfceb94015d1398202c53c83c1cf7fa5d793c538. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDY42491282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9576085da1b0d54a1c625819234bb41cfc75b480478fd3f08d1260ada78a754. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USDY42491283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b876f3b3dda034fab191dc3777bd6734faa324fbc32f0c6864cb20a58b8e33. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USMH92349384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fae81fba2d9da2a90d5972c4a0e3ae7efc5715d7df28d5cfacb9b771f645b96. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDY42347390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a117e093a981d1fed61281a76d46470e64f578488341bb602cbce5b6d768730. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDY42347391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf954fb277fec88690f4ee7e90f00d9e5462d9872a57bd089477bd74ab2e21c2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCGJ2358073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5fcf13a1809d0e7da673dee8e0a16fe59b3f6edb6d30daee838c787bc128f6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USL4R2245182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6a8b8da099d29a631b1f0ddcbb8ea48d694941ac0e48f5fde2473b9a0df5fe. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USDY42347392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5fcf13a1809d0e7da673dee8e0a16fe59b3f6edb6d30daee838c787bc128f6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USL4R2245182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e6dadf400c2c9f3429e4a54cd06548d213016dc32b43967abf773b00e4ff86. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USHM82203953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffcd4addc94db9f3da443676d743fee6c456ec02bbd613594c713bb070aab29. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM22210715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44056833b27b14a4070ddb52f7491b08bae6b33119c87aced6ffaa193bb6b432. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGH2203851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754452672a56d5ff43b5888e74471d2af16716a4165fe041387ad03b325e8936. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM82131212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59300927d6e31e979d2d309f6861bb00e23f03709656f9eb0be3a87be2b0491. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USCGJ2179794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3934e3677d8d51163bff4c380783e3a906623deff3641f1359a6db589598fc0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/uscgh2183864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50807ccbb4f5fab5c79fbab60e193929a27b98fb3940659bfaf04a0d7aa86bcd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USL4R2013549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819c767ecbc35573986d97aaac8a356f410c9443c0d4e8c55f31ea536beb2bc2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM92046302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f63171c4f882945db56887e0069b28af62d044f41772602eb8cf5eed8fc87a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USDY42064186.