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 0x77b25b486a9717479bc8ca8370b802f6bc17ab4b72badcd376325ad35106d4dd. 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/64fb20ce-4edb-4f24-a10f-3c3a966c2d7d.json and https://artists.proofprofile.net/proofs/artist/64fb20ce-4edb-4f24-a10f-3c3a966c2d7d.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 0x6ed257f254eb08bda8e88caecc573074913b0bdb6a0d0a99baed5a20087ff640. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:18:32Z), 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/TCJPR2281785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c72223298daee29f12f89d164466a444d70e87ad514ccc053a111cd1cb38913. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCJPV2368304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c67d6f3616ca82c2f66bfac7fc3cbe6e2b12e4ba84bc308b6a3a0acbeb04e8f. 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/TCJPV2368307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0239a7ad147a309ed3dfbba6c27e5c5a9b7d38706ed57e31c84ab953a6014d72. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCJPV2368306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e6410c317c26200f33f4795efc2239a32ae96fa6ecd2732e34b28b5f5bbccf. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:34:57Z), 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/TCJPX2325262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8a3aa6b981d78ca7666524ed582e099ab7803b01fdacf8e4e7c663a8d5b026. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCJPX2325263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c723505a5423d1172c072e0234cf97040d395ac0979b59e387b4018eb75f7ad. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:27:49Z), 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/TCJPX2325264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63a368a335ea3c5b04f25c83cef6042bbf74c2932eb5e30c2fa624e2b9b3dfd. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCJPC2407925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2a37b93afe5e382ef694342179377bae6fe60452b5e6c925c67ab6886efc37. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCJPD2547165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b97363bba6c6da2a8c8d01e68ce105f163db47626fe8a0c474bd16eb7268c0. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCJPD2547405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c11bcb6a5a2014bc59464a70b680c53d5ffb94d65898012bf1d6775814d5695. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCJPE2515903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b97363bba6c6da2a8c8d01e68ce105f163db47626fe8a0c474bd16eb7268c0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCJPD2547405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f69a69df3a7ff69157b14af174b17727cdf600f62012f38017b5e7beb3311c0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPE2515982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2a37b93afe5e382ef694342179377bae6fe60452b5e6c925c67ab6886efc37. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCJPD2547165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85cf3bde0d51a5508be199d6adf97272658819004cec0c3e034eb6d46496a72. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPE2515935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad41f9797d6bf2b03b90b5f9374f4352d5c6ae10687b7e0604e499a0bd031de. 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/TCJPS2283907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6b393f0768a1780c5c0c0ad6e2c99059eaa325b130566853ff2a0ab21cef0c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCJPX2382957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4853d0235fd14063f7894ce279468a15dfb16d883b1e531beb86c0a6f2cbd9. 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/TCJPQ2105462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8568c021aa1e4dec63c5117372b7c267be6e3d32806c38afd406646a652b5d98. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TCJPA2453728.
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 0x020a39d1a5383626e1fdcb18858fd0edb6293278cf968812851286011a1fd8fe. 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/TCJPR2256849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92aa668fe3b18f3a07baa4d4769f21a58ff21c5f40b64cec3738ffd10963c8a. 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/TCJPR2256858.