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 0x0f5d199e9cda6bd414ad761ca6b9da5715dfdfb883b726594dfe4129d94c9e30. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bc4049e-29a8-4c9f-8f9e-6dd786b21b40.json and https://artists.proofprofile.net/proofs/artist/6bc4049e-29a8-4c9f-8f9e-6dd786b21b40.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Psalm 134-1 Motet Looft Looft Nu Aller Heren Heer
Zingt Den Heere een Nieuw Lied! Psalmcomposities voor Koor en Orgel, Vol. 3
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 0x6f9b0f1bf38bb3cafdaa20b9e4d16d4ad1e34f86440c071801d12911d0cba04a. 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/NLVZ21681026.
Psalm 134-3 Koraal Dat 'S Heeren Zegen Op U Daal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e8812d3189f92202f9e12def1a207f698f328424b910f2c1ba9a82f926725d. 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/NLVZ21681030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d99345284de35d2bc4634315dbd1ead92d4678f69a4c84d60589af87e63363. 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/NLVZ21681032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6478ed2633d10545c0ad4373a84144dbb8a57c050c8df900f61cc04673325a28. 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/NLVZ21681045.
Psalm 38-6 'K Ben Door Uwe Wet Te Schenden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdac2fd07322de8f1e7a25e3bd197082503d1b96bbe2a01b136e1a6f1a08342. 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/NLVZ21681046.
Psalm 74-20 Aria Dat Elk Verdrukt' Uw Bijstand Eens Erlang'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9489c91c7b8fcaed4e4a852f8b013fbefa2ab0d93295cd43794fe6c1bbb96214. 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/NLVZ21681051.
Psalm 96-1 Zingt Zingt een Nieuw Gezang Den Heere
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d2404865e0bdfc1a8eb2ba6c0d0b12f0998694cdfa33821351c42173bf7ca7. 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/NLVZ21681052.
Psalm 96-5 Geeft D' Eer Aan 't Eeuwig Opperwezen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b307d28426e7fd45977a536f8972258a139387ecc1e44dbf801b324ea5200e. 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/NLVZ21681053.
Psalm 96-9 't Juich' Al voor 't Aangezicht des Heeren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf549b57d0f49dca9840ef9c89a3762c3e7383cdc57376b9eb75ab59111cf58f5. 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/NLVZ21681056.
Psalm 90-1 Gij Zijt O Heer van d'Allervroegste Jaren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394514c37535d0bcc43d074ab19e135b6d3d1ebd565ff718cb670d7f9898c38f. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/NLVZ21681033.
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
Psalm 90-2 Uw Oppermacht Die Wij Ootmoedig Eren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa71b4db46f7d4c2ab54658935d87790d6c2d4d39c3a89576cc8972200dffee. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NLVZ21681035.
Psalm 90-6 Helaas het Best van Onze Beste Dagen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18256802918471c27170a9ea73ee67bba094d37f15d393248b83909bf825cd8. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLVZ21681036.
Psalm 90-9 Laat Uw Genâ Ons met Haar Troost Verrijken
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5d8ab794773a24c664da4b106ca4da9e6c3a7ef0264b7e1e88d5230899f476. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLVZ21681037.
Psalm 103-8 Gelijk het Gras Is Ons Kortstondig Leven
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa140e6e756d731323ba9025cc3e212f829dcf348aeebe28d5d3530bb5834825b. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NLVZ21681039.
Psalm 62-1 Mijn Ziel Is Immers Stil Tot God
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37363bca9943c670a7a241e72a69ec87f58488416e11cc2e2696f3bdb5d0ced. 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/NLVZ21681041.
Psalm 62-5 in God Is Al Mijn Heil Mijn Eer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f88226f663d01c4bee4fbc89c247513c7f575aad3cd74739f4591ee692f625. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NLVZ21681042.
Psalm 38-9 maar Wat Klaag Ik Heer der Heren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358110d9253dd1c8770ff0a801d817a5e241e0af389ef9e5a38e21febc50810a. 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/NLVZ21681048.
Psalm 38-15 Want O Trouw en Eeuwig Wezen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679e0df881b64fed138fbae38dcde795b30623d4fec8bd5065da30f0fa6c539a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLVZ21681049.
Psalm 96-6 Aanbidt Hem Need'rig Al Uw Leven
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b5830c96e88dd4953b188fd02bce07f3388ab0fcd8c889057a90176c57abf1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLVZ21681055.