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 0xaf40648d1c3722c7b203bb4ccbf8a0cd584ca2e28e3e3b7f2aa615e24b67190c. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75fe4992-ab5d-44e5-9444-d9b7673aba59.json and https://artists.proofprofile.net/proofs/artist/75fe4992-ab5d-44e5-9444-d9b7673aba59.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 0x94173dea3ac3c14365457513d024e9a7f33cad8daf658b594d4354e5864d51a5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FISRK2300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b2df2299cfdfa5e583fbf8111d6ef3f965da034065d7114f3b939745c6cc0f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FISRK2300055.
Maasalo: Tuutulaulu (Tuulen soitto puissa helää)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc2d617790830e4fde11ddd46740b8dddb3646825bfd59f78e2550638a9c33d. 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/FISRK1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f8de2d221e60745acb52af7137f8c4c724e2ec0be3c5f01d6caa637c214f67. 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/FISRK1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8139b79345695e50ade5a6d5fa487a99e1ed1c6f9ee045e943bfa1efbff69f1e. 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/FISRK1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0895abb1b5049d633b2c0d024ca4b9aa35afa5c02225cac40d04b5fee4ff2c. 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/FISRK1700010.
Lindberg: Vanha virsi Taalainmaan karjamajoilta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbed6474c5a413f16813fb546e4f5efcf3aaba01809212e99115ab562b3445a. 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/FISRK1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac1d129d26fa5e4b050e744a88d1bbd1a06c6df17a669d86e040564b4259f1b. 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/FISRK1700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041ced07fec41efba6f899d5da1d373b0a3a993eacf1a91ba0464736eaa2b634. 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/FISRK1700016.
Lapin äidin kehtolaulu (Äiti lasta tuudittaa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde90e29af4cd17923d8fd0962ed591f73430e36aa4b4c76e486fe9d801ca828. 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/FISRK1700019.
Kehdon ääressä (Kaunoinen lintu, kultainen lintu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7baf353c35bd0843bd435b7323477eb269c846d73e3172bf6694a95d02bd00b. 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/FISRK1700020.
Maasalo: Rukous (Tule kanssani Herra Jeesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc187c1ed3de068e7fdecbcdf7825f1d5108abfcd8890263810edb78676ed076. 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/FISRK1700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b24ce3d1475f9b6844c67f1d54d8c742717388b46329762f0888189d91f043. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FISRK2300040.
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 0x74bf8c353468c9c292f2a392aa83b5d9826b524756a8fdf2e727a6ea98613f66. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FISRK2300041.