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 0xe71c989a465c316a0f5d8fb7abddf2a461add81ed0fa69f2355c644149c76e6a. 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/9e86f127-3c16-4eed-b0f5-4fcdc0b1a6a9.json and https://artists.proofprofile.net/proofs/artist/9e86f127-3c16-4eed-b0f5-4fcdc0b1a6a9.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 0x4d5eb37aa2f347ec256eed6e524d7d07fba238ba1c2c5c602d285bc138a19fd8. 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/TWBS31705013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d65ce15989a15e8d4014d51b8560fc2080cfc5349d1f3995a002b0346c3e1de. 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/TWBS31705020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dcc782f20f4c2476d7cfd1565b6e28dd769569f19d41c33ad31d2f93357a5f. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/TWBS31812031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba489a6a06b298779f63122f9b702dc2c64cf2f15b9095a9fb0cd183aa441c9d. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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/TWBS31909062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aac2ea27e365c4a6e6312fd31bfb266500b992b059b7045067c2ff066bbda0c. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TWBS31909063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7322e610a08027fb178265031b42a3a676f90c66e69d58fb9a52930864c66cf. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:49:17Z), 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/TWBS31909064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab9fe985869137d803a187bf26cbce303e86e41fa4fcc01ec861128235fb8c0. 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/TWBS31909066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5314d7e5e01dba0a1b4e4258fb5b05765a32ca8d01c7018e448f09610360ee17. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:39:08Z), 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/TWBS31909067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c23f9397434ef65c6ddfd6e675557b2f667e2ac5f662d52729ec8468009838. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TWBS31909068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ae835cb1a580361a6cf62a6eda8d1549b5e949d7085a3a8120a31414e4dbf4. 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/TWBS31909070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45b5ed60070f64e9254e6e21a72c68a1b7a67df01359ab903977a30d81559d9. 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/TWBS31909075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9322fc354b162c1cd4d1e084d8023d59276bec44ab24d39d975f00ffd8434c9e. 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/TWBS32003081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92daebf6e7b452634b4949c1ee20fd427fdda11dd55b2b0735a9c82f0d57569. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:42:26Z), 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/TWBS32003091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753b5ada5e816e568c76a9c6b1799d24a8d2d3a7cd453aa430a95de350c489aa. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TWF630633901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398a9ea1ca1ea12ac93eedfa5995e7d7c88f5e6cec2e7beaeb5f3d8461bc4324. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:22:24Z), 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/TWF630633902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7de5ce3ace6f8436b90e8aa3534a719d05623a728969b8246bfdf090cb97454. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TWF630633903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd157761d3bd8a41157367c342304b627dfc483e7f9c88468477fa5c7c5198c8. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:10:19Z), 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/TWF630633904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267aeb759de84ae402193da4b5f2d57231fb33d6182c8cd155561aaa20df750c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TWF630633905.