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 0x00019879ea13de3ede1306800eda86840fad296f11c95160177ccf7c355f2da3. 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/47d2d508-12d2-4689-ba82-ced28aa9e0b0.json and https://artists.proofprofile.net/proofs/artist/47d2d508-12d2-4689-ba82-ced28aa9e0b0.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 0x00457437ba1dabcc2c9daaabd7fedeb2f8058b8511afbd5a0037fd47e5216b2c. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZTB22301648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da0552b7ed4969551736af4d3d95ae6c8d230f6933652aead4e5bfccc6895aa. 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/QZTB42345203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079d7eceb2e6b4d12effde742b3b84bd4ce76f5e141f32d566b0c47b6bc7679e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:39:15Z), 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/QZTB82374637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460226f047bf1bc253f58c811263ff7b3aaaf7d6acaab70f0c5fefffb7352e69. 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/QZTB82324628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d79712b961bde079078e9a1b7bfbcb12ab9047a9bcd2c5d5150c572a914c80b. 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/QZWFF2370151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929c3465e5a2790c15436ce1f68e4299c840a42f70e17752d41ed3e612ad62b1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T04:59:15Z), 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/QZWFF2370153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1390cadb944b50cbf37557420cbcd20bbc03a7431c437cc8ef99ea502d6ea5d9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFF2370154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fa685a31039777f091248dfe6532a99d34a6cbd7540935d14c5a338b5d1a58. 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/QZWFF2370155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe981e74d74f0671535df401fb5dfcec054b31e58a4fe74751bd90454c3f23c0d. 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/QZWFF2370157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e284687989430f386e5ea19b30c33531ad24ab07a35cd4adec8b0aa1e64170. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZFZ22423017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128276730ff0f15649d3b0196cc815a2fcf2ce4f3ad601d919ba24eaf9c3e47f. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZFZ72462353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6c579d6b6d06419d7ad8045ca99712feb4d90c5f2988e63dbcaad8bd4ebf16. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:22:11Z), 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/QZDA82464984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5ea000ce61cc16e5423a61f28aeca3bcd1e87d2e4fe618d3f12519de2a3d8f. 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/QZK6J2468697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a3667e5c0e2970962ce10c995861af033ab8c33d11a56c7d6b336a23b90163. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWS2454385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec4b75bd73dfa8877540c64dbba776471c87accbbaa1cf505ae64120c5dcc56. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:53:39Z), 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/QZRP42474148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d72d3b0494dc6150f277abb5a568cab9b905c55ccfbf4c81aaa8dbd5ae8a06. 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/QZTAS2422510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce2e25f322fa9d156bd1c41c0caf5c549e5bc7d129040bfe4c1a5f5f92ec22a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAS2422513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed546fbe436bed034438b639e470b9b860f05791db0eb2cf5e10fc7dbeffbeaa. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZTAS2422514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f781d5490bb09a164ca02653ff8cd82629bd3dfb93071e0f84f66b91fe8b670. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB82574642.