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 0x0abd7fb4b1cd0259263ad1bb854a7e25ff2c4ac043c7918ad7087a645d033916. 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/fd1a5bd2-676c-488a-ad8b-30b6815ef119.json and https://artists.proofprofile.net/proofs/artist/fd1a5bd2-676c-488a-ad8b-30b6815ef119.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 0x4d31779e4fa3f90d0c55f64beb202400bb09985cb3dec1070915ffb9b8dcb60e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBEBS0300182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14297e3c04ebfe619ff212667930a5d1da619a114af025623efb4f6a4d0ebbf2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:03:11Z), 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/GBEBS0300183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2930fee7320fa73232454f3794dd9a4b502a3403942a94e34bb99635163c0a66. 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/GBEBS0300184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f56cd2b2c0bf5a4f73bd6df971fb32c0bc7d4eae972049b6d2d10fbd469974. 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/GBEBS0300185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a85a4ebb1bccbb39a9bf8e00f43c432cfb1d5e891eda119dd17c5ec0e6a5a73. 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/GBEBS0300187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc655864eb35bc00a8f0e8c9623dae0d08445504c3aca1009de0500386f1130f. 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/GBEBS0300191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c6ee02ef69a15bb1e1a8f0768e685704e028f4031fa99901b4f3d6e1b3b178. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBEBS0300186.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe605d73bd644df5395b753e6a706d2dbed880d9499d184215d0c6dc399c5359. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBEBS0300188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ce7867f0be787fa2f17cde5e10c27016a10f715238d1858012d261493526c7. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/GBEBS0300189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb058d82307096c01f8d79a06947eedfde62d37648fe00e306d11d8bf3e5d9822. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBEBS0300190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92fdb0418f5cc21fa5bb0a964e1623d27f457e55e687d1e911d5e4771ce6696. 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/GBEBS0700205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d0103744e688c00282cb365091cc25e1976c1df49715b52cc2c7c0f92db2c3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:25:51Z), 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/INB982507231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadc712909c0973104d6a9725d8b7e260b77baa603d1207828e1f3da29ae4626. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBEKR1200153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacf8f5384efbcbbd5374eb008d5b8e2e16aa37f784ed0acf2574aebaf6d54d9. 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/GBEKR1200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57490ca895ed882e44dec9f439f7f8ee42690dfbdc6a266bf4f499433c9989e9. 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/GBEKR1200231.