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 0x4aeff2167203efaeff4a922168d8fc15b31ada1fd7a8463c3b759cf648c0d946. Chain 2 (Bitcoin): anchored in block 954556 (2026-06-20T12:14:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af40c1a1-ec78-4bae-8b30-f48b89176e18.json and https://artists.proofprofile.net/proofs/artist/af40c1a1-ec78-4bae-8b30-f48b89176e18.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 0xfd77e9e4e73ae75c1b9a6efc6415107a93a38cf94efa2f8508cf1c6dc4421103. 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/FIFMF1222772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104bef97e4377a83de22f90df6754624a31c933c8f50f97432fab76e0273a6ed. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FIFMF1222774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace1152ee2f4acf84aab64c239f2a44ca437cee4d6a9413cb6b7d1c79288462d. 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/FIFFD8200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe5247a44d6d7a7afd755be273104ece487fb38d661128fa13dea5c81518361. 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/FIFMF1222777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e210e2c5bcd17ea2a59baa4537a5b674c566477319624963a5728e09ce77fd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FIFFD8100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc317a2feefca5a14011c12baa57a44e8b4ed39f0d75cec303b599460dcbc2e75. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FIFMF1222771.
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 0x66b4eaf71b172851f3ef8c00cd3bf3fa83e7165ea4ce18850cd127a9b07a13c8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FIFFD8100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463540b667864c4fa74a3365e14fceaeb20bc82c02b51cb4c19e349d066406ad. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FIFMF1222773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34166e82db381b57cb787c5548ba70434b2daca12846933216567ccfc3c8cca. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FIFMF1222775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e989c50dcecd9a139fd8f8396cddf163673b3377b109b1548bd0d5aee9846b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FIFMF1222776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1a26d9e3f6588a47de8861fc816b1267ddb8bbdaab35700bd8fc4513054277. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FIWMA0600932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27cc939fcbedb33d770835501cf08ee73688d170c09031b04db62c422d3d1c7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FIFFD8100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a4d0b38b1588b8246e0789ecadd3aaae8ce16c02edcee3701b9a0d4f48e91b. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FIFMF1222778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261780abb3a4ed9000b82ad75d0883832439df18dfc7a28aa8689793be487e40. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FIWMA0600933.
20 Suosikkia / Rautalankaklassikot 1 / Kolme kitaraa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512d08a0e21f6fdd51c439f61c941c34ae79aad4f7e00832b7ee96e750240ebf. 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/FIFMF6300006.
20 Suosikkia / Rautalankaklassikot 2 / Muurari
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111432528ed440abb952bad4055babfdffe43a7f24eaefac52218a688af588fd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FIFMF6300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb350668bcc2f212b31236eaaf33dc323140609c3750cf727a96b615c8342711. 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/FIFFD6300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2b1573d58534a2c50037cc9e60d02107d65523f78a5532f46bd3fa09fda6d0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FIFPS6300007.