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 0x069b8621000819fadbc6769d783f3b9455d4db15285d1ca50f30767e51a42b25. 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/4f4a728b-bfdf-4fbc-98ce-42ed95b58702.json and https://artists.proofprofile.net/proofs/artist/4f4a728b-bfdf-4fbc-98ce-42ed95b58702.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 0x2f22b7732a74d598105b0d589da828981c1d16841c8cfdb817a6d0a30b2aece4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHNA1985441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7699f61daa6fc8046ad81a8ae0a1fcdab4a05ea30e37c041c5289a471b5b8ada. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZK6Q1949570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e00885efbc2b1827a4d361792692081f5af17136e7ffd634cc103c41e96bc3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USAT22503983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245313aaecd5b3443f036d4c36b226ee6bea1896b9efe6da02952aff12488473. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/USAT22503997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040781f0aed2b3cb45b2e18582d70de93455a3f5ed0f255ec2c899e2bec278d7. 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/USAT22503998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2198e74f70c18f0238900a721319a2c0e098437a46982039b87ee9beb6ad2eaf. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USAT22503999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8ff60051066af9d15fd931cb37b0a8792f74be68eafd735d1507143bd5921a. 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/USAT22504001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f9e3098773a206e1ce659dad1aba9552a068fd7c9c1df2ca1b987a8c9bafd0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USAT22504003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a09c5e218954c2cde20fcf134c7007946e6e43b82a182b7ac0cf46067b4fcbc. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:22:46Z), 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/USAT22504008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d6d0c2c329220df2018044d933521f1fd69fb1aefb67bd3a5927ace8341c5b. 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/USAT22506833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a670f6ef6c8bbbfe02b836fd87453f035f94db84d0b49fe6f99f0d6639527c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMCE32100494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ef7f093f3d82af311b32955c18105a2ce64bf3883c31f2996f92c3028d3994. 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/QZFZ42182661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa4489b804a3a7213c272773d4d664031f8be39556a4580aeba71585b2a0142. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6N2098579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478e858785dc3b75d6a5fd098888965905b6aeb3f3d0177d62a540014b2f2877. 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/QZVFR2301693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d47f194940d467356ab6345e8e1bdc34e6353374615dd2cf9fd979889fe812c. 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/QZMGH2000229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881cab8183e08871887d2d804086d9e6f5a6e98870e35d5d29352470d70348be. 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/QZTAT2346748.