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 0x3e695059e59b4b05b46fec1660182e5120c20a699f6aa311e8a0573b01ecafa8. 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/19ee9980-b193-48dc-8d8f-48bce7e43aa1.json and https://artists.proofprofile.net/proofs/artist/19ee9980-b193-48dc-8d8f-48bce7e43aa1.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 0x4f63731a8000c06666d5b70b39bc8b1da5ecd0f2802590f804b273c0e5a2be57. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/DEML71500140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000497a681e78e75efe67e0132dd6ac8c0c7e4882e5596fd515195548bb5b33d. 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/DEAR42257197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6694da624c959c4093b562bf4faa1fd554723f5ada707c18c1105d97e0475a35. 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/DEAR42247075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28218a5f0b0fee44f9ac63d67efde75f2e27b822ed0cfc91a6a45152afd39e14. 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/DEAR42313018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb54f8517ce297bf2475199c21f4d2e43ae20d60d1cc49ae57d163f74b784f7e. 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/DE1JN2354743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9338b743c5eb396e39df572dd543b08b4954daec4fa56f4ffde0fcf25f2dab82. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/DE1JN2348915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f9537ec016a703752462ea723741141b90f4b6d867ac947f368000fe6c4605. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEAR42468274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd987d5736113a7529118d1aa62a83fcab04945574b6666a4af75a3d2e54c0dc. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAIS2430710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a73782ee6d4e0d54b9a905528509091d06a01c55b38a5c251f0408555a89bc. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAIT2455270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66f5655aaede5116e8ea8c6806f2eda00892a7e6713992e305fb39ab8b43bf3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAIV2440317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1d59a7aa62c676ea9154525ef4ccc05c5c174c393a8a39b234b1166184d265. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAIX2430075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662e28c5b172b3663e76e38ca6bfab7bab32db3860a7254f321ac3e6999c7edb. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAIZ2429670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e9927fc4d0f5428b39f36f7211eb13341b7bcb029bf331104b8582b200d099. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCAJE2501222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47052aab0b2b062fd93d32fb08b8f88aff8b1586ab93ae1af160e43dc7b9865. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/TCAJE2510097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4e393332382aecd41275952887d1182368c51a6264029f4af9ae44883314b6. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/TCAJT2575786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5374f7cbb741106e869290e4383d877aaacbea4c4af45419f4b93196cecb067. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAJX2564001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a634fc4e9d40f809183377ec90fd7b45cb0625f2ae7a4b95933b76dee598290. 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/DEEQ82100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416b9e5c744f4ea01e3ffa89ca371c30912e922b7d26523e3ff7398de155a6a8. 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/USZXT2454441.