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 0x354ce3d834d11d03009d43f445a54f8c274c520d6d113a6db9063db0fc11d6c9. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90ef43bd-1d68-4553-b360-1c3926061d1b.json and https://artists.proofprofile.net/proofs/artist/90ef43bd-1d68-4553-b360-1c3926061d1b.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 0xb6169c4aca787342ee9c4bb459266d8bd5b5625cd2688bf0d650b5f6b4be3a85. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBKQU2441832.
Blower's Daughter - Radeckt Interpretation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be846fd46871e05155ab0a806ae5c2305ae605a80f1ff6df61e1c8b7f219d6a. 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/GBKQU2441833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b747f60203b6623656df7292746728acd3fae1ad4eb86680e74cb7af649566. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2441834.
Blower's Daughter (Maicol MP Symbiotic Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b802705075f636cdf9557ba57a15c735fa17f52ffdf9a61eb4dbe0b9845826a. 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/DEBE72000250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b897b643214cdeb3509f158755cf0d98f320d82f4621922c29d1e44fadd09f2. 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/US83Z1519845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e090d1f0123527069d3f291e398404554d01f459c8ffdf7489158fb83fc92e. 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/US83Z2136494.
Le Carnival - Analog Jungs Remix - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fea2891b8bdc3f266870bdd60290e4ae5f77835b6d397557c0206606aa12de. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US83Z2146402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa9d850bc3baaeb7842e267d68b2718ad32e1f76d9c14fedd81e4b1951a80ee. 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/DEY472481305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f57366ced53ddaa339f595b630c30905b5f7571e4251267e5ca7c5572995ebe. 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/US83Z2022334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237056fa26623192a80ebf665daa90882b11617670a5cec235506b272fe83339. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/US83Z2424304.
Found - Claudio Ricci & Tsodor Found House Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cf43b35c6b31b909f6be8845f296390a2c197efbde0a64422be942b318c335. 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/US83Z2501637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9837fa10834fd29c21383a437ea732f67d5d0808166dc69767686ec300fa3ad9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/US83Z2501638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402fdbb6d8d50b138f0f502be7caf388512d9cbde9edcb67777f623f076112a2. 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/IL4612500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8a2b5ad56a9685bbcba47200f9bd3d1885366ff4c69cedf65727f1bbc774ac. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DEY472473709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0660eef8a3661090c361cdbf046b9e25c87071e8530495cd7aac559e4ebd7b67. 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/DEBE72000218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348a4408138f3fc83c15a28befefc71b9486de85a919023b305adbdd6ea67709. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/US83Z2511778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998491cffbda2e64614b52ca3f1eb30b8188ac71e569164bdde6eec61826ee68. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/US83Z2511780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd068e2df13e732e13f78c9af4c60edecb661b84b2e5dfbb189dfcbb774058420. 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/US83Z2511781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a18d38c6d7eff29e082f6393d9da3e5d6e80fff4de32813db6a14eaa9b4b12d. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/US83Z2511782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842afd4e6857f59cb0958debe29d8c3fe5bffed727f9b3194d493959f25d8671. 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/US83Z2511788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6c2fbf812b2abde2c5d2c6100ccc31985ba7449f88faa6ec9580134a8f7971. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/UKACT2031643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e8f50cb83dbfdbb129fdbf2ab1e2f3792aa41a687dd1c9d234cd84070f945a. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/IL4612400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e43162af600e8a5d86dcf8af37a5da337deca4c1aefe0cdba5cc61654a20b0a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/IL4612400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c72ec9a15fffabd9c3abdcb0195da037347414e1bbffe604cb5622110d7002. 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/IL4612500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd2c07eacb244d3eb0b06b49491bff32ff6f62068af0a0f2b7751682cc34a3a. 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/IL4612500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7c1765ffe6688e892eccb6ad686dfd1d97e95234b1b83fd219c47fd42a8a9a. 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/CA5KR2459242.