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 0xe076f3841d92c955be3169dc7ed020f99098eeabd4bb5b2efcd886a040b9fac5. 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/bd4cf19a-01f0-4e18-bd9a-aff4f5ac6692.json and https://artists.proofprofile.net/proofs/artist/bd4cf19a-01f0-4e18-bd9a-aff4f5ac6692.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 0x5149d44e25ea14a517ce3054c86c19656277b51f7753d99a03ae0a0f3e140a12. 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/TCADH1745666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88f3e4524db201ccc569651c69c59b3e5a4511f556e3e1fb56172011ff33cfa. 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/TCADH1745667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b903587f787d5679592dd5e8351c64cb5425ef23b512a65fc470c9c8c5db08. 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/TCADH1745668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8e451c38537680e85555933c2354e5bb9261b62266c772868ef98958cd3e82. 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/TCADH1745670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d6321e4d031336406797710d4a0c0eb1a30c5a9d9314d2058ea5df56b21c93. 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/TCADH1745671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6111b171f3dd512f2cbe52012ec1f86107f2366270283052a741df09984541. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/TCADH1745672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2fc57876cebd4ecc9c57003fb9c5c9e49348e6ea72d902096e0a8530017f60. 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/TCADH1745674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cc30d4c9a4d35971527093c80e412d7b2ad6d59c7bc084e9deee2dd724dadc. 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/TCADH1745676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbf3495e8ddd657402b6fedf6fd10de7661f142b51fd5b6185ccbc624f26f63. 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/TCADH1745677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6e3a595cf71fb3a20117e7dea98b89a86e22bc92d5b6e4c83b812dd05cc670. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TCADH1745678.
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 0x8babafdc707cbe1f8b7df3b6f5083ee2c2410ba1f0849776b22d77d1724a6f1c. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/TCADH1745660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2145ad3eec5887197e50341e184549e2b94b91bd15111f11b85f2044e0109e12. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/TCADH1745680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf7c32b6911b878f6e5d0b656470de9da232f4c78d3242b442759fa93d0ec3d. 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/PHUM71500171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce72fdc64f8fc67b809deed6e450b06ee735e1e7c68225b0039201137ea54aa. 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/PHUM71500173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3129968ab5e7e8027cc9378c84471feec6c181a1590059e9274171472a1c03b. 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/PHUM71500174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c479259fe8b0f52388298aab234126f8b70285f2fbfb2576574dcb0372c0473. 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/PHUM71500175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2bb474d9a488a7b7cd5cc8daf044d37d894b3f21dd3a8ce12d39a505806b4a. 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/PHUM71500177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc47c37e7f8149d6f04158ecc4883f101bee9f39ac28bd94ecbc61b71b11c942. 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/PHUM71500178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a52ac027862d547974962ae74d590019019d62eca510531f4cf977cb2bae7d4. 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/PHUM71500179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f161f9d4e7e7be09c8ee6d25a5d208f5f380ed4eb1912ed35f1068fbcbb43f. 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/PHUM71500180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2007a338252430ba9a91cf2a18ba666228fafe63c0058cbb5c85451bd4388b. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:55Z), 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/PHUM71500172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6603c225a68cdc22f05b2982864e45dbc47245b072ed879e89e8deba7b6785. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:50:35Z), 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/PHUM71500176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279a45175289016a3d65161caf1d4a68196b7046815b735efdf3326c337d68e7. 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/QZFZ22007976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f28ec8e40b519edf2fc67c2732f74456920845ad6f2f03bc55a9328614ab360. 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/USCGH1852079.