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 0xbf4b21b04e85b6b3e096af081017dbd9c4af33471233c000edcccbc5f6d3aa32. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8dae58ae-25f4-4f1c-81f2-7fadd7585ad0.json and https://artists.proofprofile.net/proofs/artist/8dae58ae-25f4-4f1c-81f2-7fadd7585ad0.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 0xe84c68010a47a4cc2de34f222c1629b6e313b590ece2db57e2fbbd878beb8ff0. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-21T16:23:38Z), 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/QZNJY2304000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d70b9c03c3f358228f45fa7b59a6fdbf7d9b85382019c233b594a7f3da6f17. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJY2304001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4591039fcc48bdb290a42cbdb2dc69b8f0215e3cd7ed3a542fea6742f066d476. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJY2304002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0bcec467f2799a762ee045f8ed6391ecc29c697faafbf3b84103712bab4821. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJY2304003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbeca19107382b3a1d70d91d755b13fdf82596aef63b1caee18394ea38aacd7f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJY2304004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd40d8e7b28551cb6828dda04ec209ad09ed29b3daa7dc22316bafedf6b8b775. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJY2304005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa6989357944b49a4cc8d82c03f14c74bb72fb40ba1539700409496334843cd. 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/QZNJY2304006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85577e81d654642236dbcb80719241f132eda6d1429cfaf51f4eb13fa65073a. 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/QZNJY2304007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6622a28e2f62ff84669694001efa799b6f3cd15302c30d9a780889fc5e3b3a3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJY2304008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed96c0bae0f6c61c06e675bfa07099dd1b9d0ec8abe451b9c208dc30d2088f1. 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/QZNJY2304010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58275f86b538e7eb5bf87f81a49fe8d69d44828a68418547967df74128b12924. 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/QZNJY2304011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032dfe050eea7a4eefb38863edba1c9d340ea53bb86c228543b747aadf5937b4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNJY2304012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5765a3abb35199d74e74351b8c58c96024fe4f6329f6db2dff36f6cbc80ece. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZNJX2362339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1620efa2a75afdac91fe2b2979b760cf4bc69ef26e30436508894adff77393. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZNJY2304009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48a4b7d665b3ef46e8e173bfd3d83ec0c39e678ee1635361d50c91dcad39f1b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJY2165203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d457c22f5d2a2a601b073b955552a2e243c21054b6bfba44b79c6a5b7ada9ee. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJY2165205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3be427273ab7236fe824269e7641f7e8c32eac0ca56a81c699fd88ae7a29f5. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QZNJY2165202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01390e9d9694b3228a195d9d30c251b72c318065f6242d402cfa27cab112470c. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZNJY2165204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f711752169bc52457ceed1a12f26168a59b105c3600fd2d5b560c2f2c8b1031. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJX2154196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0250dd11281088394773286b6739aef4adb20fa6eca2223654503864c65a68c. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZNJX2154197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3e8d8ab4d97eabacd6c62cfceeebffba340a91c207ddba5d23a12acffd75b9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNJX2154195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd79033901a9f9ee9617b175e1c1278f9641d96c0946f686811dc25f1cc9be8. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZNJX2154198.