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 0x6efedd803262fe7bd4a56edcd1b8e9323371dbe2ec78208e47e45338af3117a0. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dab454c8-5bbc-456d-9a0c-5c5fce8a5865.json and https://artists.proofprofile.net/proofs/artist/dab454c8-5bbc-456d-9a0c-5c5fce8a5865.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 0x42da8e5bcf839adab8ddbe37f072f7a96d56a085972d99aa97df0f7dda6047e3. 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/SE57V2359537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef86de8f66080655f532221d027637c31dd48be6c5e8816f79a303b40786a088. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/SE57V2359538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbb9efa633fe84aa12103cb283025319251e7578ee214f75cceefdec9031261. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/SE57V2359539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7f8af3ec259263cf4d5d8f6e13c76dc3ba9083c45d4b5b9201e1e7b0a4ba01. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/SE57V2359540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d4dcb7f4aaaa36d8ae72e7cec4a17a074191995e8b4ef5bd4fafb77ee9aa87. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SE57V2359541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23043797344a1f55bd223fb248f81da06cf1be783283843c0b91d999546b9195. 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/SE57V2359542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5552ff54bf9205679fee44881d9a500335dbece7d03eec94f390bd70d66e2f7e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SE57V2401511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09032906ed56053ff4824afa8dc9279af495636589b59b90135b2ebfe53354c. 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/SE57V2401512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217de24bac95f6fc5ba1dfd6267830b398302281581ecb54b3dff599e84209d5. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/SE57V2401513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab30fcaf0faaaa24c9a77bea646702bd9c60ee73b287dd19b2a27ad61765a54. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/SE57V2401514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17927f626f77e5147e4a650a071df8629e747e51a7214132614bb218632cd30f. 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/SE57V2401515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefab7f5fc1d680e721cafd46d0425e8d0b50b87ec46cb0043f1945fa52d9c6f. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/SE57V2401516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe9ffa8a595e6583cd091e092e2338ac926212e05313c292f1285003c4ff498. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/SE57V2401334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33e4d23540c9656f5c56033bce5a4826db0364566cdd005b857d57f913f40da. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/SE57V2401335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd15b6430f0c3fda392452bdd785f33c115ec9cee442addfa1ac00b29dfd0533. 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/SE57V2401336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e120dc95f78bef51de3ffe9859ae01771d282bd3a1306c747afa99f017b17b. 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/SE57V2401337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778f0b4f5f4b4f4c831e49c39676de121d15434c8f7c9a834fb7312cd118c9b2. 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/SE57V2401338.