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 0xaea790fc627a4c8631ae1fd1d95e4c156ba6c75ce131c144e031e4d8f80e7158. 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/b832433d-2ae9-4aeb-8db1-1bc2cd3d690c.json and https://artists.proofprofile.net/proofs/artist/b832433d-2ae9-4aeb-8db1-1bc2cd3d690c.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 0xa145a09becc63160b999c7637d5ef0e6acc70a19e003c3400d42bc6533977fcc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAFF2070458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6694fc4ad813c7bf4621142cd8d237a271bf413c47bbfec5f8a1a07c23d587f1. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:56:30Z), 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/TCAFF2070468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90784310489d784ec662f6a45e0d0b0781068815127430c288f9874587c30c64. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:52:39Z), 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/TCAFF2070473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4be61618f4a60905d9706864e3a7aa342659020b2d266b62947f5aeabe7107. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/TCAFF2070477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2265df5a3930fb9aea1bdd651a48cb2768cc366fbf8590b42334ea52c91a2a51. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:04:37Z), 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/TCAFF2070483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400b97c59d5c8c3a868bec3286f6d84a764a19fc55d9b2dc73ca099f797a1546. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAGA2277864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763325d4ee07c47681cdc227462f5b86aca1b74221edbdd51651ebf528ba53af. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/TCAGA2277871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9699065d2bad6f19af3eb710ed0d6a8398c14f3c5ba234e9ca5fbd0402c4730. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:53:10Z), 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/QT65W2571969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0796861b2992369fd1d46dfe923c48379fd114aabe9dca9fd98c303a236b49f2. 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/QT65W2577705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0edc8f7111067d6d20f9176225bfc53dce933531869e93e45a3ae794699d296. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT65W2577784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b9adb1b2bcc0bd5c0368b6e646971bc3c4e1469aab5cc2b392c31163f610a7. 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/QT65W2577834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12c0f87313e7fd4056c95ef2350a050e65b5c85ef0b5e8e956de44dd87fdc04. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QT65Z2535242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f844a1c17e44ded234b546fb58e4cb8d8311d99ad5bcc65aa6627be8da4147. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT65Z2594082.