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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1908c46eb76017f3aad484fcfc4550704758caa93e949d5898f55028f7e785. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65addffa-dbce-4bcf-81aa-f16aa53be3ba.json and https://artists.proofprofile.net/proofs/artist/65addffa-dbce-4bcf-81aa-f16aa53be3ba.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5a9fdec0b37ab76d0f58aefdaa1bbeede95ddc7e86595954887559723fe2b9. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAJL2525490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5ead1a8bb300f7a1dd564cfbfdf13cbaca13cd1461f34f59459261373ac78f. 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/TCAJK2525505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dba02d6ffd8ce593dc5d053114c6a6a5148a56b715cf948bc3ce193b4f8886f. 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/TCAJK2525589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdafd3c5acb65583a7726d66b521eb65ac9ecebe03e505954b3a7d0bcfb27c1. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAJK2525661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504c20078f0ac660704f77c9e0e8648534be8b876ee42cdf68ff4aefba19f090. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/TCAJM2517909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1678bdba6f9569225bde9d3ddb76959b88cc2ce013c16a0828a738854512ea65. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/TCAJM2517960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47876c2fc72aa5d847a5dfe07d53de9a18f0f634ebfe1b68452bc88a353d1f1f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAJM2517986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69210dc6db28d748c6ff9653614b3854df4402083e42d660a712aee93a13590. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAJM2518032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229c879c86646c896d24573fb6e7536a8e2cc9eef0e3f7ab0b596410bca94dcc. 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/TCAJM2518044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd398c0670770c8f4aaf0770cbdc06788174cfcf148a0a2d2d9de67fad1cf22a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAJM2518069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48e5a35ee7ac710272f79909393e9a0c2348ff3df63bb4176064a25d9d15ec7. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/TCAJM2519161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb55be7d55ae351dea455184609a2586d72fdd1f5034024b364668196659068. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAJN2519201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbf3187335a24e518bc8dc83a9c6c9afa033c0e6d26b696f0abf46e16a28cbd. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAJM2519208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6232c73d8fe4f7a93ab8be6c8da3a5101f56d71a42b96675604b2a907aecd952. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/TCAJM2519225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560d5432b511455632bb232c695ec377b0aa62f832893d35dffffceb480b7049. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJM2519230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8820cb53de0a51e1ca593e4a64a1ad090486841b231dd013d9a073c01777bfbb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAJM2519267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb756e0b1f235ebeb02577e27236e965d561dcd061fbfbf8dcf39e705eb77e3fa. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAJM2519293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cf3c72f05c75ed967615799a8ae394b909e2c1407817272d4109d10494ce35. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCAJM2519326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf135d927a1ae3927078aeed71069416e810d28c85cbb1e321e4a65fbbaa9bba3. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCAJM2519338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf404561422f61522058f50538d5fcdbc2ce68941e697ce54996278b1780f4d0f. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCAJN2519369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a467db32d81a015d0cf296b246de2d74581ef5edab5c91e6197afb9affb720. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAJM2519428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dc09bab84a6f2cc99e34d9794a9f7987e50cff8e145753b379e08f1148d35d. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/TCAJM2519441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77dc807229e6f04c1991252ff0d890aae4bb6b90624443441dcad6e9eb2b1139. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCAJM2519461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75af1021cca6551a8d8f9d6b37fd6568cde5db103d3a6752f5875d1be0952cd. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCAJM2519467.