Multipurpose Internet Mail Extensions (MIME) is a standard that extends the format of email messages to support text in character sets other than ASCII, as well as attachments of audio, video, images,
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 0xec8e4c3aa962592e2602f9aaa229f5d238ca8112a750a2ee727c00babc6e0774. 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/22af0dbb-6204-4566-aca4-2a34b26c59e8.json and https://artists.proofprofile.net/proofs/artist/22af0dbb-6204-4566-aca4-2a34b26c59e8.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 0x5afc47713cbe5af59fe95f5bb4a9ea86bb9477388ef320ea9e2ac0b250c54132. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPV501800465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4d30ca235d53fafa3596b504f555332a275acabac15e28030aac330c431fee. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/JPV501800526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077329757ead51fd54eca71ebc14d3cc76d02565ea851a90b679a45e9010e72a. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:04:21Z), 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/JPV502000443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537fdd31176f8d20af30b196a9ffec2aef2199959101a5a4990c3e0f099e5f30. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/JPV501900189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b22febdb67fe174a0745d63db73aae4bc016b58c4a828acc21c3673cca54cfa. 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/JPV502100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ed670f3927cfa1853cc3113ac5286d7587a92aeeb68cf9998535552b5db48d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JPV502000607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa420863a144743dccc28f80a5a9538e1e5650e17750c346506dc39599384d5. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/JPV502100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c770be377c80f3db49df11b733eee984a37bff6f03fa1f96a7b118e198e912c. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:25:43Z), 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/JPV502100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2ecff3fbea0d451aad1321c0a1f603512b195078c1cf2f4dcedfb7a4751389. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:29:08Z), 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/JPZ922207972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0e1405453f4a56a5b37b1f4500b552f5f37a0c71d36b4c2df93f99839e21c8. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/JPZ922211977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3089055684dd1b222ad1f8a831b5d00af5cad49346d722016d849b7b6e6f875. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/JPZ922203853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ac5992d773dc3a130407852b8402b66d6d5773b7a9391f326f6f6e325615ae. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPZ922112965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2ecff3fbea0d451aad1321c0a1f603512b195078c1cf2f4dcedfb7a4751389. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:54:50Z), 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/JPZ922207972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3089055684dd1b222ad1f8a831b5d00af5cad49346d722016d849b7b6e6f875. 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/JPZ922203853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb00639051ee21f9b8f5ddb1cde980c6dcae128248aa1c0322adab9a39754cb1. 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/TCJPA2465421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb00639051ee21f9b8f5ddb1cde980c6dcae128248aa1c0322adab9a39754cb1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCJPA2465421.