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 0x923f6f5544e316ae49defdebf65a5d2ed4073c45b9a19e66c503d8dba62143b3. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c70efd6-299c-42ed-ba00-b0ee0583600e.json and https://artists.proofprofile.net/proofs/artist/0c70efd6-299c-42ed-ba00-b0ee0583600e.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 0x929b9cb019f4c972d8b568a4b4815af79fc9f619301ef4a139f0c4760b460337. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:09:05Z), 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/QM6DC1731961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e0fdcf1c571f50ecf4664e12e82346a97659b7bfe1d9a1e020c3de726730c0. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZNFJ2110206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202281a981c94c65bf0f395eb2e7690f4690b8d795fa965cd6f011fbeb534ada. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:08:27Z), 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/QZNFJ2110208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbb6360c9872326a42bcc6099b050aa6b3d0087e114abda41c24c4843d08a29. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QM6DC1731971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa036f934a3b8ef05a6324a02b436f3d0b16e11128e35eed3a930eafc5b75cb51. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNFJ2110213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f567eba22f023424c0ccad878696b24c2504c2a273dbf22e9e12c904b58853e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:35:45Z), 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/US39V0500939.
Cuando Era Un Jovencito AKA Cotton Fields
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b04c32051a2a1f0d0df9212f5b62620e11f63de30459d06ee1f42fe08c4f932. 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/US39V0500940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c91e44d82eef793ad4be31d845031d7ff8f880b6995e32545d037361c21c74a. 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/US39V0500941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbca8a7e12f80d433907314628dabfd82049318525fa8fa2734814411fcd85e2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:43:47Z), 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/US39V0500938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f567eba22f023424c0ccad878696b24c2504c2a273dbf22e9e12c904b58853e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/US39V0500939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b04c32051a2a1f0d0df9212f5b62620e11f63de30459d06ee1f42fe08c4f932. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/US39V0500940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c91e44d82eef793ad4be31d845031d7ff8f880b6995e32545d037361c21c74a. 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/US39V0500941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a6d914ebcc3ae10207223c57b1f2c282f23ef15a3a7bdcd33af49880d215c7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US39V0500942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929b9cb019f4c972d8b568a4b4815af79fc9f619301ef4a139f0c4760b460337. 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/QM6DC1731961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc392aeb4009bae9f2f2fd2b15d5410d2783cbb34da7ab1bd3f77c61663b862d1. 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/QM6DC1731986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa036f934a3b8ef05a6324a02b436f3d0b16e11128e35eed3a930eafc5b75cb51. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZNFJ2110213.