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 0xe40c5755c1417a7962ec468b6b1cd5cad44cbeb04a7e557eaa11de5d7a7ae1b2. 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/ce9187c2-21c9-4e5c-aa7f-08522069c83d.json and https://artists.proofprofile.net/proofs/artist/ce9187c2-21c9-4e5c-aa7f-08522069c83d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Espressione | Vol. I | Onder de schaduw van uw vleugels zal ik vrolijk zingen
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 0x70baf1eec7bffc1c8059cba1f0ba6e954fdf6a4ec695c7703706d16508fbe8cc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLCQ62040101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7e39d5f2801767ffc7f344da886d83516441622b70f7c670b3bf381e64d673. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NLCQ62040102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe906e49adc710bb8b30fa2f423236e93b2a133e6f3d732de583a6e834831c47e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/NLCQ62040103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cb8e0c8e45d1fec07a88c4e74dabe852b56ed1e7eeebccb5b757c8691aaee2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/NLCQ62040105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb669c8189629d7ef8c06498389fbea78ed95cad85def460d63ea7bead806c96c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLCQ62040106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdca97b47e80014606408f3de8b56bf107e94d47e659676d636cf817c887e162. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLCQ62040107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe88334389f8d179f6c8cb88b774182e7e9afcea827d49399e3f22ccd94d579d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/NLCQ62040108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94798e8a5242f9523f3b19d8af47055a9c136148245d1f2c37dc2baeb2e03df6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLCQ62040109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bf0d8fb9139c7dc58b061dbb812381429a8151b3d9439afec9f8a205b7d823. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLCQ62040110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf0d8350919c6b663d0ed4cd4f84c6624e10fd899eeb7408fd3057287599040. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/NLCQ62040112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac889bd01d2763dd0ecff994a55ab26b99cf6a4a7e74b5eda54153298a0152a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLCQ62040113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380ea7209ae1e1953ae589533181cdecbef9cfa1b2880b2fc4b02913ec40e213. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/NLCQ62040114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf367e7b78ce34f3eebdef7bd8e6f5543c5d800c27337f9c9f4f948af9126338c. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/NLCQ62040115.
Espressione | Vol. II | Ik hef mijn ogen op naar de bergen, vanwaar mijn hulp komen zal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4949a97b03b21e506013a008b528e95d53f41e7fdbd109898ac0e5267b6e00. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLCQ62440108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d842a4d8af9547a71c3b3bcb96680a9850fb0d6614ad0534a3c5124ad8c1ca. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/NLCQ62440109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c35a1b012a7d4cf1b93d954514fff9e4e9d17e019f97c51971bd062cda8782a. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/NLCQ62440111.