thumb|Souvarit Souvarit is a Finnish song and dance music ensemble founded in 1978, a schlager pop band that plays mainly Lapland-themed dance music. The founding members included Lasse Hoikka on lea
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 0x772d4dd8ad51a743b656bc7fef0ac3e5c0c409b1af7b6e76bcc6e920aa2d9498. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac2671aa-34ca-4b3d-bdc9-ad1663214d67.json and https://artists.proofprofile.net/proofs/artist/ac2671aa-34ca-4b3d-bdc9-ad1663214d67.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 0xecb573eaf2d1bd29bb5ca1eb065c44a620f575179836417cc2f7719aea612780. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/FIFMF8000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b372277b0ee82d9895177c937913c77f6865f64536ffce02e7649e188768c0. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:24:12Z), 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/FIFMF8100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921dcabc0fb29d5f96683fec49b6d3318e914bad82a2505d756b586a91c95618. 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/FITAT9900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae83b3898c05cfbcf43b8c92aaf66ab45ee291f4447eeb208f1263d4ff2b7fb. 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/FITAT8500182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0ddf25a9610d3e16b7037b4e51d6fc2e9edc0944de548937885a5222019e2a. 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/FITAT9900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e0a79e21a1ea625f167adf1afff606cbe205554a4a8f5b2752613729491066. 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/FITAT9600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869145b301b6efcc9a51e61da5493b2cf5b1fb20f0ede3aa3953928d0eb97890. 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/FITAT9600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9bc34753cada001c9c678b2b9b1a6cdd574c145c1ba492a0c1a2c54da68307. 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/FITAT9800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3c5bf0bd2160c9537296e93e332a6881efd004102c5d55159f2823bf4f05ba. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FIVLM1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6a7b3fe90fd30b2d0746c68b0279455ca334f6a31a308f88ef4e909daaa5f0. 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/FITAT9800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35d8fd265dd92113544cd59b96728b3a49c8a9e34d70bfef4935a07d08535e9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FIVLM1400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9ed8f570ef250f8060836e749f9fc62b9311e05d309b68d87939c4f4233ef3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FITAT9900026.
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 0x51df3cef0adeae2fc6f10dcfbc249905dc04b8977fbdb4765b9bf6146d5d654f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FITAT9900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6783d9b351f6b95f197545b7bdb4249965e4f1aa4acf76caf0587fa64429927. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/FITAT9800012.