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 0x4ff7ad3364248d6969873f9d0850855cecb10172fc19a6444d41e4bdf40fdc8c. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fe6f55a-fd53-4c49-ae93-7ac6852da41b.json and https://artists.proofprofile.net/proofs/artist/0fe6f55a-fd53-4c49-ae93-7ac6852da41b.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 0x2379048b1db68ebbfac6befc33feece6c10007038fc52b3b3b563a73bf33ce0d. 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/GBRF52100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea16cd01a6c04dde059e7622a14276050de947d47709e8f177a5e9cde9c15b16. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GBLV62214445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ec7c007d33af51ff49ea0cefaee3c3784eb6a5a1d001e9a7c1ad6ddde6038d. 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/UKN6K2400883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88960d13000646a650f8d0cb6102757dc5ed1adf024e1d4866dec5e476748650. 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/GBCEQ2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a5487eff6dd7b6b3082d7e02f460ce9ef99ef76f0c6d9418a13c2b7db90916. 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/UKN6K2401643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd956852746b7eca7ba7be7c645b7c0352ff108e9301eb0ab66908efc4eb9541. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/UKN6K2401644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab24b18fdb6aa586dabb271464de3dc0801850496eee1850b91e4dd203dd7ae5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/UKN6K2401645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e637d1de3fb1bd1cd576a6c5ea8ca77727af787f6598655c9f72ffe63c4cba. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/UKN6K2401646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab24b18fdb6aa586dabb271464de3dc0801850496eee1850b91e4dd203dd7ae5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/UKN6K2401645.
Richness is Life - Sweetpea Bubblerz Mix - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5119a36f7ee9a66aae04e2aabca9548dce92b4dbaf61cd8b9c602817731673. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/UKN6K2401055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f71ec2ac89d481105717e76cf9dbd720295a3fa4b9c295adfc57b72f2ecaf0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UKN6K2401059.
Richness is Life - Sweetpea Bubblerz Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33066a6ebe81002509b1653e71ad5e3c323d8837339480f5792183e25254f996. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/UKN6K2400937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b3108cfd34c61f3e90f082b2f46bb6fc69b2236a4a74bf0cc643b515cc4426. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBCJY1900112.