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 0x22a861c405aacb8a609ce11b4406a315edb1a714be0bd7eb4b101efdb404c6f5. 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/b0091b1f-4bdc-4779-bf2a-65494c44b8f4.json and https://artists.proofprofile.net/proofs/artist/b0091b1f-4bdc-4779-bf2a-65494c44b8f4.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 0xf2102d6bd68ab49fdb3f94a449aa76b0e3ad1f7c594875b15bfdfd9243641e5a. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZWFG2499292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323360e089872e4767badb20192c9040f34530072feabff76445fdabe260aba4. 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/QZWFG2497624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb44c50400f9ddd7ea2c1670df8771de34eeffe7db1ef5f42e9566c72607feb. 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/QZWFG2499290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19780fb1ad70d95a6b6655bc4cd38056053bc5fc51b12874befde717864c5cfd. 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/QZWFG2499291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4749e6497a4c8ea7b7c76ffa9e6b97e6e181cf9268c01fe1f30d7a564d83969. 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/QZWFG2499289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323fa9ad3c2024ba262e14225d20ee3e7243e019d3ba18c500a058c680ee3023. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZWFG2499393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9535b0b8c24846fe363ee5b83e33bd7e4d38eeffbe5f1f3818729ec9668fc5. 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/QZWFG2499390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c79e23e7c6b918f8b850ec52a3a4c319e926b5e1a276e36aa474bf0ec8b651. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/QZWFG2499394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47817a991f1c59efbe31ce20bb9734add7e61b23f9e979c4103941a182fda01. 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/QZWFJ2440919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee7a5c6c10426865aae3aa26af014f2f1f909006091c170bb9c26cc479a2501. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZWFJ2434272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28810598bb12659e130faae608b6cac2f991537523fc308aac19a0619be91ec2. 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/QZWFV2453392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a08dea3545433643eb6bcc264c4f5a86e9be8709dc7295c4e6b3413a76452cd. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:37:44Z), 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/QZWFV2465586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50618ae9b1d7dffb188e5ea310fd61b67001b648b43c3c35d93765c4a1c1efdf. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:28:22Z), 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/QZWFV2469064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5b68bf02c60083fa2e4aa5bfe59a6cd59078ae0d9c4f877db6401c708f7c47. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZWFV2469067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2df23c8b14b6222160cd92dbd5e8ddcd430a2e4a8912814b894a9d05d68d3c. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:48:08Z), 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/QZWFV2453398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1457c947a6e945b7d7c3e2d379da60880c9226534fdd19dbe579f1ad84cdf917. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZWFV2453397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedc8e6228f46fdc6972066ac58fe82dd038e32df056d46971704a2adabbda84. 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/QZWFV2451635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7724751471a2ba83cea80fe23b48bfa723247661a0b5bd4f30b18ba9212879e. 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/QZWFV2453391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b3b539d63a8cb5bcfea3649a2e957b602e1cf6cbf2694d6158059e37c955e3. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZWFV2453399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71fb644b21c322180fddbd2ad78b6ba9a1e45d22f85d8a4f56d9af9e0345b86. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZWFV2469066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922d58a47951177c3a72ca3241d1b0644b2e23aab3efd69f4db9a8f59c091104. 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/QZWFV2453393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1953ccd0ba1a08cbd5b55a68e0c336350afa46cd8b78de30fd450e38ee2134a6. 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/QZWFV2471627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b91777810d99a034dfb3ce5bd8bfead9383ef997862c3caaeb79f19b986d4e1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:46:50Z), 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/QZWFV2453394.