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 0xe7e874a13f05eae7b7fa33255e35d2dd7f3d2b552b03ba441907da85318ad4af. 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/9aa75c3b-abe4-4e6e-b604-a0f5f6ecf08c.json and https://artists.proofprofile.net/proofs/artist/9aa75c3b-abe4-4e6e-b604-a0f5f6ecf08c.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 0x36ddd8121f213e6b5c3770a7426d25d1a9e568cf23f9dac71c6b0046e6c1986a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFD2042834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e00f4764dac3bc70e4998dbcd779b82dcf85086f8fb25f6f977c9419f17647. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAGG2211716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4918004dce4a1168fc4c5e7adc25917d912aa11fbc97c10d63a487e4f020c2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAGH2225822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c1c03e043a6068944ea41810d35b5e974afef121a1b11509d71aa9dab16077. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFA2081355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748a06cc8ecddea9aeb73c9001c0826bc5f682eccc64970fe41843e415075b18. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAGH2225853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8706916bea992d0bf6cff4dae82b1dcb1c1a442d984ff0c1d3393d787dd1e505. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAFW2121996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66f96f72a409b152144cccdeecbb7233a7c498bfe6e42846c8a74bb7560f6e3. 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/TCAGH2225863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87321fb4b2770fd8b3138f1385a872ae6eaad19be02249670fb8402a12f489da. 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/TCAGH2225864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f31d2667b574922d2b39a611d31ead263c9e80cacc003098b88bf88fff6f8c0. 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/TCAGH2225867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd016351485bc7ffe52278033a41ad2293302b07fc82c09499c3fded2329ac2. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCAGH2225868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e46d675ed8b155f4002e8955afa7a5c6c005f8c2b62b0f1496c793269d180b5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAGL2266904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024e49dcd719fb194ca6dea761444da9d9a73f4c34c10680dd2e6263c1331d42. 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/TCAHS2303340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac6cc5b3ba86c69b841eb3e470a14198d502f91ea39cfed27102b0c1e975cc5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAIS2492960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29031648bb70f3a2756b0cb1ac10ff1a7f22839765e652ff783dae29060dbaa. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAGN2289641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3296cfd40e26b475661c36313b6c0cd492c8658ae13536ac2491c1f3501cffa. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTAU2225362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866bbef9be5cbe617c36d60ce8f547884968704b8343cb2cf182440e483ff51b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6H2266518.