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 0x554d694a6567a91efa5b9e70c254c532c8000166b2b5a0fccbf61e97b3e07188. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35355f3a-baff-426d-9fbd-2c9bfec8178b.json and https://artists.proofprofile.net/proofs/artist/35355f3a-baff-426d-9fbd-2c9bfec8178b.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 0x8b1fab35db0d1c796dd3a7b9ca570e9f4794bfd599c65f593c69a4b99d0b6a24. 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/QM6XS1601965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c6a4b48dab207548eb7a815c55f836ca60f52423c9297d75743dfbd5ccfd0f. 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/QM6XS1601994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e9161b0b750fcf60dad71c53c259f86f1bdcf04795dc4230d1cf460fb9a1c5. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QM6XS1601966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd7499dd654878ecb3b58f99dfeb29561e24ce1920dd1e782918c71f83d55f4. 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/QM6XS1601967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f33ac2213447a7d422faf29034a7da734333b2353031dcaddf359745a484e72. 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/QM6XS1601996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0687c2bb5bd3fdff253f88188b7ea6e5bd24b50937a97db59717210ef5df37. 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/QM6XS1601998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e69f847c3f7886daf1f4549f725cacdb17d805731aacbe44c9fc558bb1f488a. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QM6XS1601969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b689c4ce426998991fd0fae90139dcc7301d8199f0e4bb6b78035aaa623c932. 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/QM6XS1601999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27f23e06e304ffd3ccbe08f6bfac179a93f23aa7f7a3d7681676549d757aad6. 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/QM6XS1601970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a335b82ab8133b7fad68311ea9a4adba51727d9b24190dfd8b2a379549f564. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QM6XS1601971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf980f6a253149ff18c4152d8cb58f40951a5b6dc39c73bd710b3b8a9a052b2e6. 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/QM6XS1601972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7526b47b8f8acd9ed1e305b47ecef7667dd5a8ef454cd7bdfb79e6a4c95cc0d. 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/QM6XS1602004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b25df92d22511c717002864be5c8efe0813b0c0c0037137b58727855fb1577. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QM6XS1601973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6189d2e72be117512e495473cae5dc926efd7eb2a4c3a9bf4cdbacbbc72c6b. 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/QM6XS1602005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea6b7b665a233d179e44b972e422bac3ffd08bbcd171f05f7e3cea9549a2918. 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/QM6XS1601977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0ac208b1a6515695ee0180c9e35b377d37ec8310fc35e3a0a6bad1ec7f4534. 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/QM6XS1601982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816e0c8620e04277d38b1fbbff24e0b6dc4fd57df9361cd091eaa0fbcf729296. 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/QM6XS1601983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f31c997327dc5e41afb1c59b45cc8edc404814a1d8824f83c572d4a615d1a2. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QM6XS1601985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbb1a23709e2b89e564c7e40b3b539d1f7cf2597d0cc5a61061b00e69d3a292. 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/QM6XS1601987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0757d775519a3d5d34fad7225daa1aa59388c589342093f83700c0e8e313f58a. 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/QM6XS1601989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cb635a7ea59b877b83938199c98b37519483c22fe79147e7b444d16769897f. 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/QM6XS1601990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0f0ea9f5b16ad0d918492e48d88439973f8ca7b1e507b894d39d60da9ec054. 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/QM6XS1601993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49fbc3c4d4d75a8de973208e0d162988d6d916c82b369f52e444cfb1a07a939. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM6XS1601992.
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 0x10c69cdf82fedfe57a40a41642b33f6cbdfae7b7eb1f54b612278f141db3051b. 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/ITM461700089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e331b5dabfd2e9ab460a085e10138db42b03b773d9cfb3905db602e46b3742. 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/ITM461700091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29398e66eb9ff804289dc511622fbb20761c329b50b1fd9637a8c36fbd0c4fba. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITM461700092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b945d2ca1285473f7722c393bbc63a6e935094f98397b46b05dda6ba00d1c1. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ITM461700090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1f16ea09eeb069f7e3a71624c372be0f1a4d183c7e82290322ab9395ad2433. 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/DESC61600088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399ed5e0d41d4e21f86c1f3c2670e24826781dcae71d3868fe462ebe8f4c33a0. 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/DESC61600089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e44ae332d65acc0557e0007f6d5f70cd78cf6eaef3264b59ec61b70f1747da. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DESC61600090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34766a3faff7c4bd6131c6b276cde2c5b0abeea566236484e22b1ffd8cddf192. 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/DESC61600091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28fab92a2f32e90b2db45fbb8156b7707b2370297dc057e05787d07159b003f. 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/DESC61600092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab0b65142529305c616db17b32d651c45cfe3e61d4aa2b94e241cbe429fa485. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DESC61600093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676638e2dbdcc0202f022bbf7549cff4ea307215bec3d0bad0eb770c3ca9c99f. 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/DESC61300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6acef903a77e159f403e0a260befad6a664f3e5606c0f230c98bb0ef7b0cd9. 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/DESC61300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d8dbb13ff4255911a083e923506712b5b51e567f777eb80d8bf5b67d9c1a17. 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/DESC61300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc556b4a140818d340e44197cd1c30d785eb23f7a35d78c81693881bb4a54c2c. 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/DESC61300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487a678128cb2d4ae7f43e79f96dc025ded3ed4463993310f49a1a29b21d215a. 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/DESC61300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ec92b5c539a483b7c106f816c47103beb1c4e9dc3e860e853c2b92d9462a1e. 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/DESC61300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f234d97214da529dcb2ddad82f3374d082e4ff80921ed79768e3f8743ae2dae. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:05:08Z), 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/DESC61300025.