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 0xc003159af4f89b02445a628dfae8e7aa70542b412132cc7b0f3ad3752e65069c. 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/2d67b907-1aa5-4176-b685-98175e708ed4.json and https://artists.proofprofile.net/proofs/artist/2d67b907-1aa5-4176-b685-98175e708ed4.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 0xdd2c874a35fc3ab4f9af3b5f19a82baa3eaded32c4ebe52bf495f8f4b933a4e3. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:50:41Z), 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/QZAPG1716755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f2d3e2321f0468236bf1587e2caa027e443a6510d9633c5df12e9e8fbd9b50. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ZZOPM2223583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e77ee2fef805e55b32c903c6b8647042fe162991b806ed977682be2dd78ef48. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USLZJ2236662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff9945b188cd8dbc4c3b8f5f701a5a174a344d242b02f5dfe9b2439a7dc0572. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:29:19Z), 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/QZTLA2217501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c27898d5e3c3c634ce8bd8d6731b9e4f08871ec728a06602f8551285ff53ad. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/RUA322201112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55d1e9689f8b84154cf89da64dda9a1b5aaf6f581553a0b50e76a5f58dda729. 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/RUA322201113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a06fbe68b0d88f1119a35c50efcf1a433940b8ff374e7f40a830e6fd4c86fd. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWDD2290829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6133855f2cc6a0a28afe9404e63633e28f4cca6caf40004520139ac26e2d25. 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/QZTBA2311801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd9de8c70b968be0e00e499bbb7cf7ca92f189343e5614864233b8149e4c064. 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/QZTBC2370254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce2804025e01ba93473ba034f6d26ba5ad8b6e618a2b12d11e4e295115324ed. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ8B2369769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351901c9fce94886d6348785032587c02001f456a1fc69f637a7bd62b7a33f9f. 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/RUAGT2428917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fb85148298243658caeca23faa7064e0f922435bf88257ba74ec3a84ebb053. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/RUAGT2428918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266d45fe1d9a2fd1da9a00a361625c0934efd072989f18b60f3cb49fd13a81d6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/RUAGT2449995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6aea4d744104a9a08e580071bab132e3cc4129ec12d9332160edff992e2d237. 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/RUAGT2449996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3eea7ffb8d8445864b4d46dfee7fa3d92906965c7e8aa19ebbf9becabaacb27. 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/RUAGV2511260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf56234d1d28da46e670ed3f55aa7cb38eeed23d9fceae3cd24a3548677a7c1. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/RUAGV2511261.