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 0xba289262f0a4649fbede72493c2e1ee069faf80292e0cf34893c2e0eb3ed8f95. 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/419147c8-daa6-4cae-9d3f-177b8a411d19.json and https://artists.proofprofile.net/proofs/artist/419147c8-daa6-4cae-9d3f-177b8a411d19.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 0x5e1c7776b918bde7562f38db3da643cc4e4c349becaeead99179fe9b967ba69f. 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/UKHAU2000099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ed150182d9ec2e9fb454d67fc8ab5a1e5ec1b5838a44a8507e666f527cf0cf. 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/FR96X1986831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085f1db3bfde8bc5989adbd8e364b99493dd34e3cdb66af6933a4c4dfca37760. 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/UKHAU2000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6356cdd31c931b3ae9a024c7cc1daa2458a937fb093ff59935ca4c17efc2af8. 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/UKHAU2000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0db05d55d8db8977b813b004cd0b165e0bb5a3902423a01234a6c9519c6b3a. 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/UKHAU2000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8794edb403218ed06d61426ba479a3b24340a1dc871d7010749f15c06c6ebd. 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/UKHAU2000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d37fa413d49a7ae626b54543f5188af878629c9fd17d40ae36531e268ce493a. 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/UKHAU1900308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60884d8014e634a76f1bc402fb0fbaadaad4ae44e6c8d42ab31fe4de42088f76. 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/UKHAU2000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc6e5b9325535fa7dde903f496ebc94c732b8bdf16422a047dbd523e4651427. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKHAU2000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd82a64ff9575b2d05496e2aacf87cf8e39eed7ba9b4fdc5e8e1f972359912a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKHAU2000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b53ea688d34eb35f356d9d113cb1bd156e187708db7fbeb2d532463014d17a. 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/UKHAU2000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c395360e6961ccb5e569a887d698878724cb7838aedcc678c1ca8a8e89b0cd9. 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/UKHAU2000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cfd37549dca63a2da2c579694807a677ec758c3951836805b0db7854da13bd. 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/UKHAU2000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095f8eebf77f96806d03a42210551c997bd78e57f74604c0075e7d7667cf4d82. 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/UKHAU2000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97893db1e9ed0bde4dbda13569891ba846a6930170e71141470fcda5ea0e09dc. 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/UKHAU2000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f70ec892442f90e87db47d8efc87ef128b0b814584f927e378d06773b78ee9. 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/QMDA62306076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1ea2a004b198d371ac6a636cf714b0633c4914d4ec4c9609ee5e066fdc0a36. 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/UKW3Z2000285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b754724ee251822776f2094ef4058567d766cd96814c8e2eed206dcda26af47. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/UKW3Z2000286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ebb25f7f049e945878662e3491e3c4b823795087d821edbc0c787d57b8919b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/UKW3Z2000284.
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 0x9e43bf08b3a5a3720534df2177bea6701b93529066d71b1d6d5ed883dc9f5e75. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/UKW3Z2000287.