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 0x160ce659c7eb124340aa886b8fa977f46c1cdabfb808f1ccfa1e024637d70a10. 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/fec28847-2f72-45f0-8066-e9887d5a8054.json and https://artists.proofprofile.net/proofs/artist/fec28847-2f72-45f0-8066-e9887d5a8054.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nastassja Kinski, une vie à soi (Original Soundtrack)
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 0x1902ba710deca603109db1eb51434449b114a1313ce5c9abb68f7a250f6ffa90. 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/FR9W12349093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efe2267434be1ea9c58b4406e6b35cd94d0097a9b1485b79f2f2e1f43c8831e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:47:05Z), 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/FR9W12349094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff077620dc67ad342ad569c3e12f5873953044df59055142eb5015244365852. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12349095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3361c709000a73494d232a120842299bfbb99fe9df767e7e3654cc54506425. 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/FR9W12349096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b6c00f57da2a6fe80b88d7c1b5666cd45fa115ae910a684dbe903a4ac9f1ff. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FR9W12349097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb443b49492fe13aee4951e0517626de611ddab060806447a3249c7f90e789619. 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/FR9W12349098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d46b7e747cebbf30aac8434aaabeada43b9be84085069e8893f88c3aa3d262. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR9W12349099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8372ea5096489a14490d5bc7bc1a4a08f6ddd361e5ffc67f05877863e9a2ce95. 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/FR9W12349100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2c0e3f223c5151a324d235843731bd4417d08f3db7d491e7be605e591fe6ea. 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/FR9W12349106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4093bd7c0abb6c093e77bdbe93a9a9ea49fc68df62e5261d1c65c611817c0349. 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/FR9W12349110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7abcdd9efd0e26ab7cccd35d957681db75be7c36dcf89c51b11a05d455726e. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR9W12349092.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e45f2573cc85655715e1162712f0e5b184797ab365da0aeaab3442e2f840334. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/FR9W12349102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b43ffe9c40048c6790e333809ce2ed04129c77a9ad07e8176ec3db86834c58. 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/FR9W12349103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234b23b8c4fe9b664ea231f0170e75db05a18a27ccb11ee049855549c8174f64. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/FR9W12349104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5264de0c56c725f70e86c6d9c1b517a85bdf445e9213fde578c79da305b7492. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR9W12349105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6083281628dd82a873601d43d099e6e10813743ec168a6fe0cbc1e913393ec5a. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FR9W12349107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94fc66aa01fa062a73b56f2b609f6d095f98982d06fa79c52c9e3481c805c84. 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/FR9W12349108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612e32a44c5b660a8bb51022152dbe3e653a85e8f4543a329a17232f76e1bd3b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR9W12349109.