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 0x3dffd08eef4aa893165e397b96a6aea6fb9ca623ef263e9ca4019b2a2a357d35. 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/6a7c120f-0b04-4ca4-af64-80e5c2c5c3ba.json and https://artists.proofprofile.net/proofs/artist/6a7c120f-0b04-4ca4-af64-80e5c2c5c3ba.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 0xee3a558de40820ed46e4a68fe924d4c30f3bcf2f2503c9656c9587e7468ee371. 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/JPP561100667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba24e58d1e99f8e8448e8b28d509d95ca85727a869043cca2b36eb26ea507a8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCJPJ1946890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810e38910dba3104d76b4b0bafc7e120f19a9441932c2e4efbd50314c4e38ce1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCJPJ1946895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63fa77178f2479b8d0c78fe278df82e157dd63e25acd50629cdfb4125fc4dd2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCJPJ1922445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9498b465b01cafb5354c4dd64311e47e048fe7f1fdc078e74f52f78638f8c9. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/TCJPL2027773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e9009d70ace1726a07c1c000495f18c3efdc11c415e30adb5e5a8232122211. 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/TCJPL2027788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5c4dc9c67e382b41bfb674d01a84aaab1c1c643605d4f53710ca80de2845c5. 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/TCJPK1924007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f8fa9e42c64a3f21e957857afa4c2249f4cc1e3f90050daa67bfe1c319033c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCJPJ1989037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c2c0bbfd43a6603f29add8bc577fd79f98a5f801459452bc6b3290bce35600. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCJPK2061033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bdcb802efcfebe4e9226f30c6636c01ec6e02ba85c0b983ca5f03017244413. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCJPK2061036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cd5f5d35d9e67872386ea887f1378465246dd2da9575eb413b32d5cfa3139b. 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/TCJPJ1989966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03412a50f9ea3421f4e0b95a9d40db80e210f830c05239014cc35a70723f0141. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCJPI1999325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376c608b23326e6d6027bf450618c77c749cea6ba48d5f314344f9983ee95e0e. 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/TCJPI1999154.
Hereafter [feat. shully] - Myosuke Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa577ea9c56886b1225febcb0e3263624319da40c6c39663b5e82851c5c67168f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCJPJ1922426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fd63a537d634d9d288c7bb639cb8b26ae0419b4a1919537fd8717b29938177. 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/TCJPQ2128890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cd2ba07f95a34d7acab7a275f5145aab1dd2c15e0ec2dfc47baadca9454c58. 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/TCJPR2262132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59fe9d9f7a955518ed0e05348d14cd9d24bb84a66ade5c6bc8862cb4d3fd946. 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/TCJPM2079270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d01224d64d7d3ed5ce9006fadb866e8b37dc527d1d76d5c076047e661571438. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/TCJPM2083317.