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 0xd4392f02cbd118f3d7374e9bd715978dcbaa042f58d1d0884852da4ed6625eff. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/905a4403-5f02-4af1-ac21-d225ba1bc5b5.json and https://artists.proofprofile.net/proofs/artist/905a4403-5f02-4af1-ac21-d225ba1bc5b5.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 0x79f13a5d4ca1f06f2eb4e05b59bce46dc44409036b8005daa6763e732e2454d3. 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/NLG620613033.
Koraalbewerking:In der schepping morgenstond - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f797d2fe965f58bccfdad48eb3521367ca943ff2e028fdf90380c1bce43057. 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/NLG620613036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1940ae8a18a87e658db61af86b0d90a163cf2f68299098540690484d53678668. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLG620613039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf04511cf1f20b57c1b5cc4dbc4c3b4a027249ebc7dcf550ed9bc8ad89ecf6a. 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/NLG620613040.
Preludium: Eeuwen geleden - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bb7a845e7897584e11e2878d859c9e6f7e844d6de22526c0f9cb8d51a59a41. 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/NLG620613044.
Paraphrase en koraal: Op U, mijn heiland, blijf ik hopen - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d8dcfa2efda78b71727291587ef0aab69b2e0e9516dd28efa7788b9543471e. 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/NLG620613045.
't Was nacht in Bethl'hems dreven - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575f5048ff6315b3a5e2fc95698a240fe75b4cc0c6fc413c88153d67f9302f13. 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/NLG620613049.
Geen wiegje als rustplaats - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfb96d9cb51aa5c949a659d7425f8379b316286ad0ac5f8b68be37a5c0c9898. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NLG620613032.
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
Eer zij God in onzer dagen - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c0bb1fc24f9daa271d322424b677d8c21d014f3cdc1e84e9edd3826bdfe3b9. 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/NLG620613034.
Rondo:In der schepping morgenstond - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753a9d83c758722ffe929c078ea4b8e24fba11d948f3f35eae8684268fe50087. 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/NLG620613037.
Zo lief had god de wereld - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29029785cf72b1bc1b8f3828f51a5f3841660a9b38c9cb18ea0cd740bc39b796. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NLG620613038.
Overture:'t Is geboren het Godd'lijk Kind/Andante en koraal - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad673d90b14714c45b5648704b22065b1c1144d41e5b9bca027f0ca417d60e8. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/NLG620613041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d57277fe173cc679dfb12246bf82c9b302f7187a9a58a2947f6eae4bc98da2c. 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/NLG620613042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694556b20796b3c32044f74e024e0f93bd87bbc4e118ccf1d079a64ba4daf97d. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/NLG620613043.
Er is een Kindeke geboren op d'aard' - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca09db5bfe6da8718005260e09a2b577fa16ccad296708afb645addb4140e2b2. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NLG620613046.
Ik kniel aan Uwe kribbe neer - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2650a18c8910ba8ca905cef50981744e6d91d40714f249b8ebaa93efe516a77f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLG620613047.
De herdertjes lagen bij nachte - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dfc48feade8c6fbb195451f53bda3ea25ec2a196841cae6bc52a4069623a25. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/NLG620613048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d03b53af7ff7900ef037d5f07da598a1000aa701d6217dc894162948253d8b. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/NLG620613050.