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 0x5b3db794e3366048494bdd6ba29119ef46a830c14b1b1430328846ec9413aa84. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44452bc7-8fb0-4c3e-976d-706a03835161.json and https://artists.proofprofile.net/proofs/artist/44452bc7-8fb0-4c3e-976d-706a03835161.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 0x441031b8b2caa4981de1cc479f2256065a998f368b9acc567395c1ac2cfd7cb7. 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/QZ22B1990847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac5d7621213425f37e5a4f14209a746fd0ba6d79fa3c8539042b4614084814f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZ22B1990848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7232326f58240f104d71558f543e0f58ba9d98f4571f1c01e0a867d64a8ceae1. 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/QZ22B1990856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf644a3b4eee252fe64b01130cba36020898d39faaf9c9a10076c428688f2cd40. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZ22B2066407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e7317fe31a7b3700c1f2ccb3f6ff627332f70674fffac89bc887cab346f1ba. 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/QZ22B2066410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a64053f5ab78634be589c04dad2f82a7aaf954793826e7492e4ca6b9d692506. 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/QZGWW2041451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddea041b3a68df1eda49c87ba951162db89fc7a4c1053f96213dd97773d82b7a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZGWW2041453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c59a2a6127aff99a0272ce471998966b9528a78bbfeb4621b3596c3974f5dd. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZGWW2041454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8213790187beb9dae5bddd28067a42a68222a9434899cc720f820210b5daa646. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZLQR2068574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a06a31b641e931ac276be372c29920b07cd999f5e312fec9538047b46dc644. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZLQR2080794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7740e384de71098f28533348a6b3c820735405128857dd05bc3677388e4b23e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE5752209731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d35a1016c9f791e52a43e3d462740705fd75c677046aa60170dcd9aefe76d6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:07:18Z), 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/SE5752209732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57deebaba0d87e703d049e850bc972d854ba028d43b60629fe793548ad3ef785. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/SE6HN2217409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a81d8b3a90bd7e17bb187dcef05d22098d57d23d6b136402d9f9055b88112e. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/SE6HN2217418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c3c93d45d0c3d2615879ca9f5db34b2003688e3bbf0fdde7ccfe40aacd5d02. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/SE6QE2348780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c299c35ac4edec0a3d5bdaaaf19a2bf4693561b0e8a9c65c0acfd8eaa757d9. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/SE6QE2348782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9485c0b1da8ade5fe9cd27baaeb9e5a2b83e43f1c89da4afe46d66e1dc1f3c4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE5BU2423174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0a8c417e7cce1b61923e82c72d34773ca26e1bb893ee2e1b9c776638b45b4f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE5BU2423180.