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 0xb9ec6ee0b70722f6f26403a237d1b954709d6663b341745e37a6e4dbc2f63500. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0849892e-3540-4a25-97cd-237fa431737a.json and https://artists.proofprofile.net/proofs/artist/0849892e-3540-4a25-97cd-237fa431737a.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 0x89731415497a195dd58e4298d3c173eda82e2913d19cb6e5783a36096c6fbd3a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAHQ2358545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7c56ca4c948562bc79aa981f563bd775490f7403f25185a01f0621c280924e. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:01:14Z), 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/TCAHQ2358574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52d5f7d7b9ba14f58c66fcdb6a9005d82fb3cb3243a27f196bf190e9969cedf. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TCAHQ2358580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ab3ceb6658a9cb317c886c9b3461ef39312d06773bb0a7c73231943f17da76. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:22:21Z), 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/TCAHW2480941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fa7fb024afa941691fc74d7db4d57eb37166eaf2f3ba69ae92d47ea43504fe. 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/TCAHW2480947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc810b7ded9c3baf58e7c458a808e3acaaca5d03dfd56b2618ed2e57f981efa67. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:36:18Z), 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/TCAHW2480970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b135618abac159ed64d9b0cfe7ad594c520ae1a1730bfe8c30530a1946ef05. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAHW2480977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b18e705ad6acda06ef8f1a8cf923087bcf31007019818b39fef620797ba3b0. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/TCAHW2481001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522dc6c2b86df2ecf9919b640688fbe912f3030e80718c5b818203744a7334bc. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAJF2536012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb389ef8234b50bcec1757d303def060dece2f33b748a9fe0dc6e6b245f3bd9c. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/FXR592402277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb599420881f058883c809af68bd80b34bc19b0642cecb4d0f9b7ea8a7f3cf9. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:52:05Z), 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/FXR592402413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8553b96df930db804a0bf37a327fbf6bd39aa3b0260162639da972768aa051. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FXR592402816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f05bbf73e2fcf03080afd3c4ef8801cf0a5af30f3c08d219daa3a5829cdcb16. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FXR592403034.