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 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 0x9e8ae48d3153850341d369384b33e7e994b5f0d640d7274653567905b970d4db. 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/058ed5b9-adcf-47f3-8835-f54010e62544.json and https://artists.proofprofile.net/proofs/artist/058ed5b9-adcf-47f3-8835-f54010e62544.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 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 0x93f00e3c65f0fe97f6c439e0109af8998a187d1b469fe94d88eab52a82ed4da6. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/RUA1H2457661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963a3f71af3e2a23cdfa331e1841a89b76aee7fc4b37774da0374fbbfb396155. 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/RUA1H2457662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5892bd919c853fa7493430c45e6e52faa0ead72223112164affe0c7d0096d2. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/RUA1H2460133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38935573af9ed363c4ba4c600c0fe1314012c11e6c8fdd37e89d7debc00ec33. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/RUA1H2460134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49717e0a69949355ca72a6581ecc9295e3ac076af4e6a55faa9e8ca64e21ae49. 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/RUA1H2460135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2395d988df7c683b49ab7c4d0bb6e6b117de7f941c4a8444456ca60400c298. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUA1H2460136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286d2362c250aa99672a3d08da7c7ac2ae642ed8dbd45674afe95529d78d0e98. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/RUA1H2460137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c54ce635b6416dee7ad39cdfc592e7baec95b944bde7d1070d444e1512cdff7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/RUA1H2460138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7621f434d7b73cf8eac1fd6cf45ce8006e59d3b127f00b776ea26ccc99cf06eb. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/RUA1H2460139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054c0d173ab2210cc9bce81178b7eafac916d9b42bf531fc363e49b67d15ddb8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUA1H2460140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089b07110303c2e9db737959f9e3701a1e65bc826e9e6564c660cb3a3fcf5123. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/AEA2M2172325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e005510945c969f6dce04ce2e4d775ed4d7c81d51e15b7a44920eedd50ebe8. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/AEA2M2172327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7c7ad292e9580e8724aa1a86cd73d16192d1855dd694bc82115da19bc0b418. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/AEA2M2172328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb583abe4ffe6e3da15df4850d733f2c3bcde333b57ccac20265237bc4e29c773. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/AEA2M2172329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6495b085ac9bb1c9cac0c60cdb1b0d72728c8cc9a5429b5c3ec3a0c0424c2e4c. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/AEA2M2172331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ea44c7c163b36ac6659577c6c505979940b7034b71726b7c140f26734ce4ca. 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/AEA2M2172332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944ddfff1d215dfe53b355d75b29820cd2e985590217dd43cdaf3d9ce5209d60. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AEA2M2172333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ae06527504c96e5095cc3d792700ecf238660cb7376bdd146cde72daae13ac. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AEA2M2172334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bf6dfeecf8b459849ffcd8933bb8000bd06eb8f5e80e622dfbc5ca9ccf9adf. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/AEA2L2309291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb94260c2b48d56872466fa944cdd23cb40d048bdc271ea83668fa7356b2a3f1. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/AEA2L2309292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74bdeae82d14f3906b9635f2d15567a7216ede7a18bfc818c00fcf98423d8f3. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/AEA2L2309293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24f265827036f3bb1fe2a2aac5e3fae4c4f5156d234a2995514c439c6778271. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/AEA2L2309294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03446304f409e6b01a6a5c3325750ed1c428de6c61289f8b5af6cf7677a8634. 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/AEA2L2309295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d74e12527ee6a213067f17a3e17a0009489852f1f950132c8336aad389b8a11. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/AEA2W2477359.