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 0xda0a7b7a93fd5f0702608bba27843447269378051c0fe2ae7f23cdd099c1f4ac. 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/944fd8c3-fa4b-4fd8-bcae-1738c25d5101.json and https://artists.proofprofile.net/proofs/artist/944fd8c3-fa4b-4fd8-bcae-1738c25d5101.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 0x5ccf5c9c7b4a45220266b8aa8f8eabf56924a2fe0c87ed8741611c35c6525b02. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZGLS2257026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fee93b10e1dd41e3e2e4182a42bae744ea9db4cfa3607cafd944731828b399. 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/QZMZ92280100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4c4b9cb7449985983d84bac64e03ee34602db8d8203221fc17a84c9ea687c5. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:05:58Z), 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/QZNJY2219089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d805644ac41f7457a4a0299c04d1d029fcb455f91fb5befef77958d95169590. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZTVM2259581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f7dbec6421ad60bcaa5ad10e7606b59eb6c718f61f651792d353191b4c24ea. 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/QZW9M2228750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836eb53df65ab730939cf27378cf477186578d5faf7476f49d210d4728fb92c7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZW9M2227978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170bb32e0a2ca89bad4fb391b277a4d0a1c7ea17976417000f52122cacd0f52f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ5AB2310495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73eb54c578b51a4a83b3b7e9d8be331ccc9221389624f8bab19773b6bb19130a. 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/QZGLM2317216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf5ea167f4b0dc9b57984d78c52973ca94f467002d46964b92d109a20859511. 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/QZNJW2371566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fde8daf64d0dcd95019446e6db7db421b41c0fe2efc1f4ff48be33a598b330. 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/QZW9M2321631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1abcc45195dce2028c15711bc1a96763ad252131344e235b8a1f410991bc648. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:31Z), 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/QZGLS2472906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba6b600ae25b065dee40d6d29344dc3b6c50d68c67117ccf85e7e08927c3849. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:59:32Z), 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/QZNJV2439549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d3029e68af9c5694ad0d45e5729b791a378a201aca88a2d941d542df6763a9. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNJW2486663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bdece7558f15d2c4d1ffe709178e6d15b99c7c14ca7f41855b50fd563e66af. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZTPX2497677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e7b2b0c6863ec3d94831d5a98a2d97ef08f4f23a6296cb6322ccaf86171bef. 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/QZW9K2460811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ff22e655e7f0b4b931458b39437b09833d7d0e1924db3f8f36a487fafc810b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GXD7G2517502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacd359b676c94ea875ba5429fa0a95dafa122ba7bd07c2db417939193a31271. 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/QZNJV2518244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1f77f0127f5226659ac9c95a9c3cb33c7b246f3f9a6728e81261118c567690. 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/QZNJV2546659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee3e5860089d04766a5761a2b80c20492ff4b01ec199c8c0e344fb33bb5c5ae. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZW9K2515356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0339e9f39f0c5ef5aa22c155d28babcb83765de1dda776b3913163a13937444. 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/QZTPX2418839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870002e5a9dde1b96a823cd4a3f419162de3bfd78db58a2f9c53cb8755aadd00. 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/QZNJV2520994.