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 0xe0f604be79c11276535bddc5c4e4e63a7b239cbb5d99a6ad2cd1650267eca3f8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ac2e0d8-d2eb-4a5a-a972-92d75caeb832.json and https://artists.proofprofile.net/proofs/artist/4ac2e0d8-d2eb-4a5a-a972-92d75caeb832.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 0xdf46b556a9a654fe7c27629824e9373b737cda447227b06e8a696cbd2b57d281. 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/USEP41818001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d6c0a193d22909ef1c1fc5cac3e4f22fb28e57b74199af22e9b25db8551829. 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/USEP41818002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f6134c443713b35f8842622b745a283bae09c76b6d34bb068755a21cd5b632. 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/USEP41818004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfea366bc0e02f8ee05373c4d00970cd7f7c269131ae96a030c0410d65fed38. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USEP41818007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b3914f0f4853c715cdb72f1f6e1f5ecc1da1529e0e15c3a20cd9fcc4d375d8. 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/USEP41818009.
When You Walk a Long Distance You Are Tired (Deluxe Edition)
When You Walk a Long Distance You Are Tired
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1894ae885ef6c7d677a5492ed876dde3ff7167b9777f49954e7d21e2dd6263f5. 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/QM5BK1500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b0b97399c99c94c97b9c35f183edd93a20d058cee44e68254c4dfe3f676934. 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/QM5BK1500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5dc7d80e126fb6c0ce70b6b5bb30b300f93dc480373cbfc15cecbf0ac55123. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:32:00Z), 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/QM5BK1500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7739d90c7ae895e13d066f023934cdc4434ddaa834fa798621abba1e84f85454. 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/QM5BK1500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90ed68d65dd51b338d913ae3693546cbb645541349b8fde515405f742908340. 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/QM5BK1500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731f54e560d189491c8a84bcaadd22e5074eafbbe7b99d2a821cf230e728fe9c. 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/QM5BK1500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8e6b3b8d641108f98dddfc48815047da41b02c9907d51ce9febc62d791d574. 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/USMRG1861707.
Polyvinyl 4-Track Singles Series, Vol. 3
It Hurts Until It Doesn't - Audiotree Live Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b30f12c60a0cad2390e2f6bcdab601a6250adf0127147d9836302f544b808b. 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/QM99V1510902.
No Crying in Baseball - Audiotree Live Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3056fdbc490e8ca7827d5978beef8f3a9bd3e092d988234a60e80778902db810. 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/QM99V1510903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41ed59f4fcae27f6039ce38b4f2c2b544f648c18a18ebf83bbeeae0d1e9af3f. 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/QM99V1510904.