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 0x423b7fbaac573340eb667ff9fe8dd23aac0fce9698dbd796db9986b8f0774aec. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3d632ed-a358-41eb-b0b0-9cb187b107cd.json and https://artists.proofprofile.net/proofs/artist/a3d632ed-a358-41eb-b0b0-9cb187b107cd.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 0x57a517cf8e47082d9d8c2a0d91884caa15d65a140c3b7787b1dd1208d9f4495d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTBC2354715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd48920c14ee090401cef7967c7358a430bc0c0c67fbb96f0847c38c3371d999. 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/QZTBC2354716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951ac1506c98658d2fc6f59b7cf9591778e3d928b4684aa0767614df2db2ec37. 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/QZTBC2354717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccd0d9ad977f668bac5dba1c992ee735fdaaf6b62def7629c82b834feac3bec. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTBC2354719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a517cf8e47082d9d8c2a0d91884caa15d65a140c3b7787b1dd1208d9f4495d. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:06:21Z), 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/QZTBC2354715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd48920c14ee090401cef7967c7358a430bc0c0c67fbb96f0847c38c3371d999. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTBC2354716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951ac1506c98658d2fc6f59b7cf9591778e3d928b4684aa0767614df2db2ec37. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBC2354717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb908e1c1e39b9f70892002192b5c7b993e5803d7bed01d309f8a95658618313. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZTB92401324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b272e4c99e07069bb0dd36d4c1e258a39ecfac51b9f6bae0f157d80c1e58a1. 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/QZTBA2416973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec32b01114351535a66a83b66ec160b69b96ef2ddd963db9b4732be590de7f27. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZTBA2416974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7346ea04715b36c95a179c4124be76798632c025500225ab5ea1e682da3c85c2. 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/QZTBA2416977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf040e3cf970629f79b3b16375c0492f2374eae9941adccc078ad07f13678e1. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZTBA2416978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8024f1107feedfaa0fdee597be1de053aea2159f9fd0cfa18fc94dcded7f73. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTBA2416979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bba34c1b37f2d1fe08e86728df641e7d03391c3487ab6a928137da38c7ba14. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZTBA2416980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2095ed2c0f7a0877680fe283536b600d20e199873c43a6bdd13c315dd040905. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZTBA2416981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb908e1c1e39b9f70892002192b5c7b993e5803d7bed01d309f8a95658618313. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZTB92401324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b272e4c99e07069bb0dd36d4c1e258a39ecfac51b9f6bae0f157d80c1e58a1. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTBA2416973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7346ea04715b36c95a179c4124be76798632c025500225ab5ea1e682da3c85c2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTBA2416977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8024f1107feedfaa0fdee597be1de053aea2159f9fd0cfa18fc94dcded7f73. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBA2416979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0ebff18c9657b264c78eb56710325b92f24a075277b230a7148036b94a199b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ762501601.