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 0xb62ba7d63e90f04c7549b029a00dacf1ddc5d11c6b78fb3866a694d901cfcd3e. Chain 2 (Bitcoin): anchored in block 953885 (2026-06-16T04:12:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b39aeca-9c7c-481c-87ae-531bdd739745.json and https://artists.proofprofile.net/proofs/artist/0b39aeca-9c7c-481c-87ae-531bdd739745.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lee "Scratch" Perry & Friends: Back to the Ark
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 0xddb248a35d8862bacb3df1fd0512b5173db35127b354c7068c0d04d269372013. 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/FRIDO2010893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c7894ee53c8b4886f7e7f69c8548b18be26587755c3cef1a2ed687b42eed8b. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/FRIDO2010894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1192fa50f2e0fe32332cbf9a6c8b1294945bda3277416669d9e6e7878df80b. 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/FRIDO2010895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f71fa03e6e4ab8e4f7fe89b9e2bb2e64c104eac46ec1a8447aa8c018f25f81. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/FRIDO2010896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d66ac6155fcf73b480d8c5a5fbeef663200d382969a87f73c3cc0388ea9428b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FRIDO2010897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c51bf767344216c3bc86a1f9321fe91eba2e91d9808f1e20b430017398557b3. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FRIDO2010898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d89612eb85ca5807c4269c9a6449aead105d6e26bcb35d1cbe69c63ceae4a0d. 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/FRIDO2010900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013f0ee5722e7abf83a7f50aadbf8df4d175241b93d3143da021f34ba32545e2. 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/FRIDO2010901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80642425f1b9019d90edbbaf4ef515769750a01dc5ee50996891ed68e7a648c6. 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/FRIDO2010902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ca5a5c38bde57c494c18b813a205c6cfa996ef8ed66564dfef2ad0a4a87576. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FRIDO2010903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ae9114746664cc33c2a49ebeb6fdf65bb44673ba2de70a7d4569410b3565e3. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/FRIDO2010904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083590eb40db4a67553c385eee6cf20d6a65e7cd5547fe086424919a31645e8a. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FRIDO2010908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa62b4d7ff823b6cc62fd4adbbf4e242cf76cd14a455df96439bb63c4e0b430. 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/GBNJE0600109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbba7084ef249a401295599e70af442228bc2be225925ed260ef3f0820fb619. 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/USQY51253672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91925e20631aae7cd8af848411326909b8ea70db1e629db8daf97306dfac77f3. 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/USQY51253676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc849565df5c1c6b7eccc4aab4e1d359b3a02bd50518bcb034c19a9167ada7e15. 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/FR6V81798518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1fd08c200fbb148c3c6deb7cdc28eb7dcef8bf750006f5ed3b974a2ba91236. 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/FR6V81798524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc1c3659defbf87fec2dbf2f48c551bd382761378df10862f6880c54955be61. 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/FR6V81798492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd309ab60230c4a8271b01085a4438e95ef6b184d0864423a749430198ab39d31. 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/GBNJE0600064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c634f17da3773eaca8fde9d83ab8fdd7379166e444ddcc3f60fbf703a4af7ab. 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/GBNJE0600070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06dcdf298be80fd547a527fad9e506df9e7f01839e6a7ffb5dbbf2c1dcdc9c5c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBNJE0600072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4254d1dd6bffe77165cabd5d5c3c57cd0e006e2f3babe54a5273cdc194f396e5. 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/GBNJE0600073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1eb4a9b933a076b0c22f924daa9789e18914521dc730f89b57b7e5f0fc757ed. 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/GBNJE0600074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64a0ad8fe3c1c5bf1cc5cb928c23810a96025c03545aeb63326610c2d2b09b6. 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/GBNJE0600481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe777fd99526154187a1ef7df23b7e27853e362a6bfbe8f90fcc6c42c6d1558a6. 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/USQY51253662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d25877496cea0cc82d3d7fed2b5f7de2e50bb16c32638f70706c88f5114c18. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USQY51253663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03aa96eaa802dd20ea0a44e3d03988d3228f7ea0dd5b7a7e15442893dc2ecfa. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBDHR1600086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4860f4061ce3c0d17e280f8327e44bfab83d824a71944bcf14824c9db1bc5120. 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/GB8KT1400006.