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 0x072691dcbe838c3f3a717c7a8018d84c6a53e67a40a1119615130b3bf3a658b8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/585a9b6f-3ddb-41c5-bec8-b98779617e16.json and https://artists.proofprofile.net/proofs/artist/585a9b6f-3ddb-41c5-bec8-b98779617e16.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 0x43edb5187798c606c8747748dcbb6738d1e7fe472470419c0a478d9bb4016140. 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/HKUM71400486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7578ca5c9a8a02db5c9b565b66850bd7315b2138e88171aa0f7f3510c75985b. 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/HKUM71400487.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85d9b7f0ab69df90426c4222a8843463ab98a2fd298b7f4b2a3db4dacb67e99. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKB120503038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59532e71b8696b3f2cd09b16858b938550ebd4012161e5f74e1a8a69823f2675. 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/HKB124603018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0435da97f4247f88c3c9a676024f120cabe65a6864781efc846f4b7fc5c42cc. 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/HKUM71400502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d9554d858974c803e16985b24c462aa54cf1d2f214402b8bfd081d7e2ff476. 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/HKB127103018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464857e9026fe83ad94634dd5663b559037b12dfbf51b5307e9d6140de196687. 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/HKUM71400490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77446419f15f938c68d42bc3a3f60d06427e27b525c45a808d6cbe363d135e20. 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/HKUM71400503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e51b5d13be9970a71e2868f5a365779c56a15b133087ab1dd4e586db6cd6e3a. 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/HKUM71400491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474aedb5fd6bb543d94c7c8b6af8b159a13c1299531bf0958413d2c90e319200. 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/HKUM71400492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922d37aa1b1733880c251d10c56ebac1862f70994f0d93e17797e05e450a60ef. 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/HKUM71400493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091dd61b941f781c0f98a0c96773516acc9d94f9f4c38be7a2d5749558824669. 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/HKB120700188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08979d5d54203b26303b0d40bb847c6faf914823c822b97595400bcaf98541c. 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/HKUM71400495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51a66cdb17349d2526846e25c697d15a0d0dbbcc182071cdfac3bde20b53468. 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/HKUM71400496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b83911cef5505fcebe90c0a18ef93b3b30f9045916786943d6c1fcb0d859d93. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKUM71400497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12963cf2c1bc16c0303befc87d9c038eaf64b36503ba0565f6dcf7b980f4bb33. 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/HKUM71400524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bba2f541c0c87c78cd9a404787afca4d4335b4c75d8d0c828199e9bab7c5ab6. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/HKUM71400501.
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 0x9a12a7a7262ce2d0d23930d7623438a3e8f4c4a8a88d93446a2fd4c980453d65. 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/HKB120520208.