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 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 0xb3f680aa041255f71455009637d2a443d3a6435a4fab5c66190ed0a629a16207. Chain 2 (Bitcoin): anchored in block 953709 (2026-06-14T23:31:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f457f1c-b94a-4c8e-be07-e1248efb24a8.json and https://artists.proofprofile.net/proofs/artist/7f457f1c-b94a-4c8e-be07-e1248efb24a8.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 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 0xd01dc131d9f34d7c488c5109c58439aefc32f7c27c5a76d507f4a58615503f29. 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/QZTB42344098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6521670c8b70a77f2594b2fce63762a14df4be3e1af0151cda75f635eb43cbd9. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZFYX2144450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab6362e89148b1f81a148f4333d9c19a179c42a35adc4e61d4b16a930ca73e7. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZFYX2144451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda84ef1a474d60c5f7d89f817a48620566a4a10192405220ba5c1cb3b90d0dbc. 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/QZFYX2144452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c19020d870ddf92fdac659307a1701bf6054684661a6b9bb2c33964b137e37. 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/QZFYX2144453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dce99292be7282a2321c5bff94cb6ae44c11ff94a76f47db36a05fe091e0ad2. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZFYX2144454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0135201248fd0b52980f55db0b94c77bb56be545a7895b0a34bfa8c7ced971e9. 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/QZFYX2144456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc6f6ef506684d145130d01843f4d8bc5d389f26363faf6c4305172214e61c7. 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/QZFYX2144457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0f4dc0925b6cd904ea26d9bfd2b083da136cd38321d474f4619c691b08f93d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZFYX2144459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca660114b18cdc2183fed2ce241c193581d96b3f01d26d90d87974e95fad4987. 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/QZFYX2144460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dc9841e2f7d38bc5a3cc2a545245a1659c7dc795a2f0a86e3c95940a3ad188. 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/QZFYX2144461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7209918a428382ca7581a84d77eda6ac5ef32bd21661bd4867a9e374ab0a25bb. 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/QZFYX2144462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb50862ef68b692c055f678ddb54a74be4f7e86ae4fe72c27bc562f88ef8596. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/QZHNA1955685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab4bd6a8960eb072a215c1e8a8a56a199379f21a76a926941a5b1dc74d6c742. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZK6F2491820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41776bf1ffbc77b55354c6d0259649ec02ccbd04f9355e69194ed9f6d952de2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZK6F2491821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fabe84e8bd66326f95924361c08ecec7205be95a6ed2ddcce5cfed177e9da87. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZK6F2491822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0a28fc5f88a33389bcc5564ef733139684fa54de2253a2f7e5ca0bd7d69431. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZK6F2491823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ef6bcb4d39661de82296a3b423c1364d16ecc5ee8dddaae7d5762b565824f7. 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/QZK6F2491824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37197c0533fab053781971b79e05970f98bc0b01c8517500e2b41563527bde54. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZK6F2491827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62414dda0c3e61d668e60cb603bd0e6db6074369774f9971966b936711d652c7. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZK6F2491828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271c9529d2f640173b8509dfa9085237b25f35fa986b0d98bfddd0bc4e90d0c3. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZK6F2491832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134ab5ab1c13edc051f3d0b8755b5fa9853c206040100d1b19b753a6309801f0. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZK6N2479445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1608672ef08a33c4c5f017cbcbbfb30ff95fa3dcb29a1624e1137d6f264cf9. 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/QZMEN2221222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865ab8eb08f3eabdf24e3f122bcce04e4b1a6d37c8d43463f338eed14f671ed7. 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/QZMEN2221223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47d5d97522a8c10c9d059501a738b974d63db2ad9ca13f6afdf52e240b70252. 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/QZMEN2221236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b88bc4c75c28e0a42dec6065f3a2b14c4b0b1d2196ee2bec24f58b1aa194ca. 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/QM24S2206507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fe09ec1040662b4eca14355b05c0b7dcca1cc0a7364ffb4984acc725e7b12a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZTB62236820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3d6faa231b55b8103798a721a6c70d8aa373d48005bb0cda13d9e4331c880c. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZK6P2283197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87587eb8ea4cbb28989f5c0fc9e09297669c7e98ee06eaa1db514bc55ab17d38. 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/QZK6M2239661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a2e0c6b509eee8ce663e0f590213e12e61e5bf52a7c5b0a1bbd9215774afb1. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZFZ62384460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c8b1e7696c0c6d3d03cb5cfe6caa429f250ed81ee1b57b2387635615ccc8e6. 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/QZFZ42315317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4667699f3f83a5d1b41276871f4b27c554b9e1ce37a3af1927c7f0338828fcad. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZTB92200361.
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