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 0x3861b6c84aed64816d74addeacdd158eb4e84706cdd62087d7f72312bfe850a8. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6fc4733-f41e-48d8-916f-8c22ff89f24d.json and https://artists.proofprofile.net/proofs/artist/e6fc4733-f41e-48d8-916f-8c22ff89f24d.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 0x4b204a67a86ab0c7015f743b6070d8aff732cb19548b037e9c5f0e73be448499. 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/TCACE1555308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd588dee5eea10ba771d03355fa12cc4dd50b3f861c50e713b50e53915b3f1e. 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/TCACE1555311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565af67e234fa80960e14df3c89adcea4ffe2fdd7a54f37b5eff2f853c004c36. 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/TCACE1555319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbeb2c48ed023816269ab7e919ede5fbe6d8ff39c38d3f8f40daa3f5edecb0f. 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/TCABZ1472145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e90d6a16f2a413c1a1157b73e4750b3342c9d4778168f01f40118b3ed327a6c. 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/TCABZ1472146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4180a03d0cc932351a65285b555472cdf900f05fd89ce7742e54734049303cb2. 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/TCABZ1472148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec31d39a3a6fc584ddc34f7abb54599624a5d6057b18417a8509e94507209bf. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCABZ1472150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ad7123f57df6d1b9456d3fa38d65aae1344d26d4316bbb3654c219d39edb1c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DGA0L2497228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044d27b0c78f65e3cd2ad31a9b431b36a14f4b59abcd996087ced983bf44f7a2. 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/DGA0L2497269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26afb78be7f0e56bb55492dd200f6f410a22a7543c25dd07775ca2d964b0803. 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/DGA0P2413071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f31e1a207bd825723d8cab6c229a3d3db44e37780986870b84a96aae7f86ef9. 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/DGA0L2490841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61b4fec12b32a80148f8eef411be8a06eef4ddad14fcc59213a8d84bc7a74ac. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DGA0L2472015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04295a593338642d0bf891f86178d95ebe52bf5a8c93eaf62b163dad1cb4c0c. 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/DGA0H2315789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa6759cf594d471ce44b123c92bb16e34a1b593cb886891285c42303bcb73cb. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DGA072300526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433606313bf4c53a30f3d438bb8bb10c53e721a49877922b22fbc9c48220ca77. 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/FRX452214835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b1939a56030bfddbb1ad3ab3e83ee69c9bcbf24f2ef96f21e214e39b2126ec. 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/FRX282293211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f2e68659cff62059170c4de699ec44e348210dfaa31919b8cdd4f8eb2b4ae9. 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/FR96X2210366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50345bc82bbc443046891efd1fc7613515038367ee13de2f1cecd27cfc623839. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR59R2248598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9059b48e9140d0baea0f60c236fd4a28b77d2b1d61c90a5cd4b41032a762ff0b. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/TCAGA2269154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60412000195649e6efb7d6950c7fceadc41ff9f5d33e829bbc0f8a21317af51d. 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/TCAFM2112590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26afb78be7f0e56bb55492dd200f6f410a22a7543c25dd07775ca2d964b0803. 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/DGA0P2413071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ddd838997e108e73cf63fd1869ce82c9d8de38ff3f73fe0f136a218c010807. 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/DGA0L2497207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f31e1a207bd825723d8cab6c229a3d3db44e37780986870b84a96aae7f86ef9. 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/DGA0L2490841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ec07739090a4cb06b0e076eb047817347626cfe34ff0e0a7a9813f1ab9bbf3. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ES5991400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ca0faec69d40c50c8ee9cc027ce7ba2a5b8520b5f0ebfe8c1cfffd6dfa1eba. 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/ES5991400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb202a629dba8e9eb16b29d5bde32c5d06d4e7127a9097bd89b59d5a468b12d69. 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/DGA0P2400885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cf45cec15654f214bc8a36a67bdc569b7abd45d8380a05a282a2b46d21114e. 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/DGA0P2401977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa045e79ec2700298a6e0f9f3debca5ad0a8a9317f000fb47e07e6180678bf20c. 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/FRX282599620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5764274bd209a1c475159bb4f1e2f640aa01ddd25e73cfc3100db38efa4f081. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA0P2401976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ddd838997e108e73cf63fd1869ce82c9d8de38ff3f73fe0f136a218c010807. 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/DGA0L2497207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00c1302adca8616a6f7c9a62ed4e85dd3cf76f95d699adcf90d99791b8c3d18. 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/DGA0P2400836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf272de91f076cfc3d1aa995aef89ebe4b715b67f46ba1e8a19129041affd23. 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/DGA0L2492105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b79454b2b0a68020f0db95f2fe43ed02ecc6aec6234886056f3cd9f4ef3bbca. 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/ES5701800178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6769855c756a397c37785b3a89c72a1cbcbe2156f775c8def2cc9fdd5743b846. 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/TCACN1674861.