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 0xfa8fd1b7282a05653bcbaee03e3031522926386e13997baa400d412a762dae54. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a0f0063-4ede-4563-93ec-107ca2ae60c2.json and https://artists.proofprofile.net/proofs/artist/6a0f0063-4ede-4563-93ec-107ca2ae60c2.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 0x9a3b7956559f76bcffc1fa0cd29aa84e071af4b6c033f4a3fe69165bc1af6c40. 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/QT3EZ2488571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7301b351109663292f2a1a63f2e72b0c5c6a9f432c94f391deaef8cc8233ed0d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QT3EZ2490471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5e4d444545c0603954bc1bd629e75ef952830dab348a2b883fc3536efc77bd. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:23:23Z), 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/QT3EZ2490474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0b92d5ae413a717e68414b28d73fdfe86666590d71f1f3dee30402bac0626f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:11:49Z), 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/QT3EZ2490475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ba8299c3a102eadc372ae1e5b8bcd5aa607714f92c6142e9e8569b033188eb. 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/QT3EZ2490478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb33201d99019d9063ad26017ccfe0db96faefd32832a7f9cdc09e3ae0b6ad4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QT3EZ2490480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65469534145a829ae063b991d9430fbe83b9a01df7ed2e2d935edd3518a07465. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:25Z), 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/QT3EZ2490481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed23e6af16a7fd01a84cd426395ef0932a9ee4d6d5285562c9da505867b7218. 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/QT3EZ2490482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d5ffa3c9fbeb8ab7fb40411d65672115a9abf2a44274862949252a63a87abd. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QT3EZ2490483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4743de8475f1c5cacd5b564d2d272223b78be77998a5463beda8df463c6c67b. 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/QT3EZ2490484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd50163dfc7227f19c595e4a09886b3b48e94ad825fc82adc9caa681ba41c2b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:07:48Z), 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/QT3EZ2490486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a3731c5159f4e76bd5fcd48c4171c127f0fbcbe0cde79dc2d8b7d5a7ed40dc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT3EZ2488595.