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 0xcfbb3b18f1d97942284a90bec885618436e841cabd409682165abd8a2aef7f27. 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/65586749-4658-49c7-9583-7fdcfb025d1c.json and https://artists.proofprofile.net/proofs/artist/65586749-4658-49c7-9583-7fdcfb025d1c.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 0xa18c253b9fd2c0be9703adf0ce5e10dc8658b770b7a3f63924d4a4778157f935. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAN112200594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8d77b63d3dddffdb2667a9ddbe3f9ddcbb0be82c43878f3b147f292d102167. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAN112201080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bc71b42d69be85e26805b23a169cdaf03ada5016ba33a1e7c197c78916d0a9. 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/CAN112201136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24887add214b318e46aeaf9e5e22bb259a126fe73e5251fdead647756b34f431. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAN112200714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d07a60526d723b4d83a53ba61dc429ba3f15d8356d8613a945874abe8bdd1c0. 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/CAN112200828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02c084330fb658ab6f5c22c1175e2f856d8dd5d4fb4de0b5ec21d0c8f00b6a0. 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/CAN112300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13b2f70e05392cc712c0568356161096508f31d8a3044f2cdf1d4d743625e47. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAN112200881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2850b03d31c572b587b374fcbe2be3e62dd11da77388cb266500bb00ca7f30. 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/CAN112201268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2daa0955d124eacabc0a9f4fc32bb15db05598e060953babf91cd06cfef5ad7b. 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/CAN112300302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f66a66749cd9811b20790998738a3eaf4ce9834edd838bbce13cb6f41213196. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAN112300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dda7b1567dc96a078bb5df9f77ed6997219dded643c4ac8e41e72c50c148ac. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAN112300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c9c70dec671e2360f5615a1e1ed0f2bd782385b843757aaffe4ed0142124d1. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CAN112300304.
The Next Billion Years (Foam and Sand Reworks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd5681fc210cc5ad9266dceaf0e76daab2b07f72c487d5edce33460e6b624fb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DELV42200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b7306a5d6e372803ed4ab08088c7b1aa7f6453584c0cf26ba0baf10978c791. 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/DELV42200060.
Post String Theory (Foam and Sand Rework)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a7525898745f2e0c99b892e58f86a301a517a9fac7653a8ef9d7b0db6af4ec. 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/DELV42200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f9a4fe33b7d8da3bb7329dcd164d64c62052112ff8a262d6aee1fe9d808912. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DELV42200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b91ae1ca5efdf16259bea9900c07c4f549b32bc49fa7c4e28d26b1d9818e7b5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DELV42200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46dedf0c972ff5143fb6fa01a0db9fa4b8e7533d8183ef8d4e4376e2711e305d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DELV42200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeeee0fdb22e9fbf47e0d1bf4834d576c52be6b5483ec21d54086cfd32a204dc. 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/DELV42200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa921ee7e8079d2f8266ffa5e3a25e02b2b7a6464b7c4f4fa26144522920421ae. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX762101677.