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 0x62de95b23ef7f0a34990299f472068085fc07c804a60a394490e37f3dffc9a77. 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/da3e89ed-43b0-4d11-b6bf-c090f04d39af.json and https://artists.proofprofile.net/proofs/artist/da3e89ed-43b0-4d11-b6bf-c090f04d39af.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 0xf6ba8b1a78ed4705c5864cba814206711537b16744431ebe6442d5222d9f8864. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:01:15Z), 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/US2640907701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34f873448937d863a1546e84a24fb0beb7f89675157c62659078c8c419a4963. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USJE71310011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e4a1d2fe6fc9fbf31feaab8d2b4d2804adf1b10ab7104c7af470168c5a40a6. 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/USJE71310012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf075c08b636b1afeac94ee1b8e602a4adeb299901c3fccc9bdb83a609c7a9127. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:10:22Z), 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/USJE71310013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e153e1e387a34f518be9e6d87757bced1230a39437522a39a2930bc803da6a. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USJE71310014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524da97bc44110ecde8e57b14c47334eec4036f0a33d8e2d820e1aeedf9aeda5. 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/USJE71310015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f265e99d147371ca48a41f55e4bdf3b91f31364f09f158850f87a259354d72. 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/USJE71310016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847ad3ed24417efbbe395433076883f9f7fec7cababfd0f5a6574133a5405ac5. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:45:06Z), 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/USJE71310017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88bb54c832d86b48404cc7102271eb58bff39297bbe61489d420d9a52d3c865. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:26:34Z), 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/QM6P41729540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4052b28f2b45f06c19b3d8c2a893c72c5f07faa53fd4d849608f67e5b128873. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM6P41729541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d67bff7321ca5291feffcd3a8a1cb76d7d9e4da12deb6b5588a36cf83397e0. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/US2641738102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bf86a5328d57cab0bc91262103f308a4d0547a59c9f79b90f2596fd92b0bb2. 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/US2641738103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5786fc63146df2dd02f175cf7bbdc9bf12baa3a777f4b5061de0de33b7644b. 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/US2641738104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad8a975b2047017b244f1d463b904d71adbc68f16c0f5fb7776663c27c52416. 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/US2641738105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a856d0d571c7129e0c0791d7ebc2e8200b84bf57aa40f2b7f869a9244cd910. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:34:49Z), 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/US2641738106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3387a7f4388d9ac26c0b25e4acd142ce328818e0335904fa83d12423b0a3cbb. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/US2641738107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e17bc4511c1c9f8fb1d55931309e18e1c5c8d66536f330caa7d37c554237e26. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US2641738111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91bcf0108887aa2feefee8ae18303bcb78f8566acf9f7fa3d830afdedf4130c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:04:18Z), 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/US2642458902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da62db157db0f473eb6d96a4db2a165a4338bca750cd8681c651f8e59b58580. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/US2642458901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da62db157db0f473eb6d96a4db2a165a4338bca750cd8681c651f8e59b58580. 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/US2642458901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91bcf0108887aa2feefee8ae18303bcb78f8566acf9f7fa3d830afdedf4130c. 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/US2642458902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fb19c4859193f1dae2e79a0083304f2c49b8414c5db9c47b3542af5939bb52. 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/US2642458903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963bad236882b755110d3b5088ef35ad75b6fc9978148353070dcc1524c8343a. 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/US2642458904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394fd666b7ffc4038f922cbbf0e0795e948ae1076b6b5a027b4fea3e693c54fe. 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/US2642458905.