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 0x7bd674c397a70a80da6481facaedd39463e132fd27888fd46346c53900061921. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/312f7cde-ff96-4832-b002-3f6c3d3d49a6.json and https://artists.proofprofile.net/proofs/artist/312f7cde-ff96-4832-b002-3f6c3d3d49a6.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 0x91d0c20c4887921b6af66ba9d3b673d3945568c76bcd062c117d4c53a0323485. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CBF8B2482143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9769cdfca43ef81e59586aae74318d84331c0547364e86d45b40c6370bd8d5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAHQJ2595980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5be4fe2cc3b763d1aa8fd4079b0d318f68927f4308acef2d4d7b44590da183. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/CAHQJ2595996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29245b26be77ec3f8dbcefc26a01bebb5505f3d3f689fa250ec233d846e64ee. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CACWV2543021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8933de7213110d75c83e766391be62c9046936cd6b3f5ce5af08141eadadaae1. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/CACWV2597885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba1583b4ce3f3ec5ae864866abf68808e9c6cf781d4b319e96f7caba24c9ae2. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:37:27Z), 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/CAENV2522460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c520e6212e8eb2bd351b58672a4a1e36ce6a55ddde7edf7a7bc5b070a0d75ef. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/CAENV2535841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92d0c4a4dc3e527e2cd16f6cf814f6f9ecbd99412b96fcdac732efd6e5bbcd1. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CAENV2564957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a831ce67c55e6a8c8b4c018fffd18266fa68ccbfa1b81805279f6a5f3948b9e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CAENV2570982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ec93f4018af2a73cdc0a4edf19a532a3479dc4767736e5d60e9a2d1e14c229. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/CAENV2571660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bed1fc7434586e8bccc7f5e4ae87b9f8c50d6f3e9f3b147fa8d84ef3646ab26. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAENV2572312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca9589e5f42c5ef2256d075c8e58d0da29f4146d5a451e5a5a431720217c82a. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZWFX2586414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d9e528d227e34b7a3e58a1d67e8219cc59aaf6874f69da8cc79cd2e92f661e. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZZ782530391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c62711d87f4a311a3b414a769a5dd9f09570f61207373445c8ce674e3eaf9b. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZKWA2329074.