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 0x71d4d0f25f8b41b27c68aea19b61ee4d8cd4c5abeca8ea565d575b53b0138729. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a419d0d-d3c3-4b99-96e9-6650cf4580a8.json and https://artists.proofprofile.net/proofs/artist/9a419d0d-d3c3-4b99-96e9-6650cf4580a8.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 0x091d7d164baa6be99cca3fc4ec803325dcaf5c641cf028688fc3e8adfd23424e. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:24:06Z), 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/QZTPX2563784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f41a069d1a5da7cea1d850379659a361c658539c5d006a1ca8502577dca9ef. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:24:37Z), 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/QZTPX2563834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13159528fef411962b3d6e4c72452106372b141cace1cd15d91ae1f0a02a4c80. 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/QZTPX2563836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a2905b97ebe204297c46693d33f8ec08b7b3c780c4b90aed45c08bd2191fa5. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZGLM2519852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1032c4c085f3fd18227922ba259861facbd8b156e06c57cbf2a1454dca31a48. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZGLM2519859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c34752e30705004fd7a640196adb3ec3851cd2ba42a6a352400da034b8c71d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:02:40Z), 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/QZGLM2519878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91006ea8bceb248b1ea6c1876b31127eb9e42a7f3b94f0bc0fea8451d2e6129b. 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/QZGLM2519887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93850e9c360d16039ff0eb384a0cd352f40181fdf4773b2a133c120ba20831e4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZGLM2519874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce1f30e19dda6455d78b40a3e9f891c7261191323cc9f5ddc882d22e5ad66b3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZGLM2519849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250d4b1234b0e9df89a1c285e5871f3afd8bcc7de688c84a9ae6aa221ce05336. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZGLM2519850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9838cfefe99136f5d702114b94ac5fa67d06f740d44aea4e72e755c57ab93d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZGLM2519910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30179d63210f14c334bfe82ca04ab2f63cb9d2fd626f4d33f5c3f167d5bf7240. 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/QZGLM2519860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024ea8dd9d4c922621e22549ceef7a6660c037119dffa109390bac65aec0394d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:44:51Z), 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/QZGLM2519902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f376cc870da91b653611fc7c558e4ae07fc69b6ecd2e53254dea48797531529. 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/QZGLM2519822.