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 0x6b59f8f76ffe802b2891dbffea7338d32eaea2eaec0ee09453c66d15355c4704. 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/8dbae55c-caf8-4287-86d3-bfab4d4d5e60.json and https://artists.proofprofile.net/proofs/artist/8dbae55c-caf8-4287-86d3-bfab4d4d5e60.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 0xdfbd46fb6b716c61c2d307e167f0d189e0c680303b2f8e6f9234318a6d33472d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:03:47Z), 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/GBSMU8738291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3104252b1c32c133340a743b2be14fb3a4fd73fe7353edb54e95647483b638. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GBSMU8738292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483e63d048742f6210955ab38c852a88b9804de502464a406e16bcd75c623a6a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBSMU8738295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4927d368317e8ea7f5f21d45b155d512864e1dd99b0a98cfcfe4f319e54f1ce7. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/GX5MX2277640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8f27d799d746bb5781b195744660106b327ba91f73a14324739f1884128966. 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/GX5MX2277642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa804cdf413bf404c3a4e3655abbdfb7553cafbf9b7c8868af29ffb0ebb9c466c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GX5MX2277646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa4d0614d748b26866a2872b24f5d83bb1212ad8dcdd97f66e5981e548f07f4. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:35:39Z), 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/GX5MX2277658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49336f120472e91e182ee251af0764c58f677a38e05bfe554c4264ee490f4a2. 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/GX5MX2277671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e2a41229c44fc0145292f626f7bd01a51437ae1c3947eff2ed4b477fcbe4db. 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/GX5MX2277652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29adb5598d84c0a2dd7a8e440f1336a9496b09033e41e8212be4b53d8870cf20. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/MXD782301547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9aa7786ce01613bd485978560c19ca99c729fcf58e1983bda77808e4d1403a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/MXD782301548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc7d0f91cfcaf9f3d66da629c3694c0018c0654de91d3eb596af644deb4ef7e. 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/MXD782301261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe647d2e37dcb263aa4d7a79ef3ec7712aa9271653c3751a14e651dcbf6bdb907. 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/MX3742400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f99753ae756df5c9aad49fac13fd3f1698aa908a4fc796e6237265587b94db4. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/QZWFM2466302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1fcbd712ed68a1f8f9d1049abb94ae8c3fef756f1e979761904bb2fb633ba2. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZZ782497687.