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 0xf88586174bf6bcf15ae855c7a780f407ee854695defcbb5d332ef3c7eb7cbf1e. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fcfc0eac-29a5-4cc5-93d0-289eacffabcb.json and https://artists.proofprofile.net/proofs/artist/fcfc0eac-29a5-4cc5-93d0-289eacffabcb.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 0x75a786aa6d3696fe0563888b7a6f65f5aaa7a44c4cbbb99ea4dd285db7749706. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZZ7P2529129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e1cc500c677b8ca626480899d1e8b9de6bc2da49cd6f6559928f6bdff8801f. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:47:24Z), 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/QZZ7P2532386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378c2f9ead1a422f8b6fd3a1a268eb592f9b136a867ea9a05ab3be5d81290f93. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZES92332143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef17729a7d14e947a218ec2db1252becf361e3ab9b47d80dba20474112f01633. 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/QZES92382691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b7f66abbf7bc7eac2b50f6e46b50ae7ceca7fed1c8fb6c027d285e35de6e07. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN62405835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7eb9ea0675be4430b4a9df0e8b76d483bbd9960a03f47f489c6e68868a869ef. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZHN62405836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6124b8341887878830929eb9d27cd594433b575a239b710aec5d462c47a38c47. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZHN62405840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc0f35ff58c6b5f154f127b6d4dc93340996dd48ede9c5a14e41dabe2b15504. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:47:51Z), 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/QZHN62405843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cef045c006af54a41396aefd9ed9681cabb2e96258bb141fb0b94d081493c3. 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/QZHN62405845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcf8a3a2c4b56b57ca4226e121b07cc08de5a663d2166e024b6897b3a882f7d. 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/QZHN62405848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf256b1f471d6b301e956e945e44da73853c7ca3196245d068ba760908d19534c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFM2479659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5aa74c552e037f95446add9fec82e89229a4e84d1d91bf68f01e856e12cb83e. 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/QZWFM2479050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd251f6c3ab2dc96b618416b9f4144f5536228bad3898343e201787863cf8f52c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHNC2543055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9fa8764cc2b306aa221e072b5ef6b7107d0ceee6f5e7b07985725fc6e43dad. 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/QZHNC2545074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca152731c3bd66534898e8fb88608f4ddf9b4a1c840e2f2afdfa338624199a2. 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/QZZ7P2531964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561a13a5ae7c8b6f6db37ae1dfdc00370d10e62486fd6af1c83165a1533e04a9. 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/QZZ7P2531966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c27e7331fdae5518018da5912c122ed2ce05099f7c18ab519f7a49414945f1. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:02:23Z), 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/QZZ7P2531972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d33c75d11953d9ee3c60a5d687177b1bdd32896a5446cf42b65910cfc204e5e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZZ7W2539048.