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 0x557fb951010c5823243385aa5e54309d459361c6296bef18e63c0d88c9ee7749. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03e9f562-2811-4789-b821-dd9b7a6437fe.json and https://artists.proofprofile.net/proofs/artist/03e9f562-2811-4789-b821-dd9b7a6437fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Psalm 25: Heer mijn hart zoekt U te vinden
Christelijk Mannenkoor Soli Deo Gloria Urk
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 0x19ccce8d0ef3ebc0176b1d43ef921ee73726974263b7cb25c94015ad1b711701. 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/NLCQ60146601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94231baf4ee3bd51851e80455dffd1f115a002ba7297e8aa8802220dea5ff184. 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/NLCQ60146602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9d9f5a9422d25f34f73354b83aab90a3b6b9f3edfdf9dbb51a4b7d008891df. 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/NLCQ60146603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94d3415c81332ae28de01fe3787ec5ffb834c0030dab134fba1f2ed7ec600b8. 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/NLCQ60146604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe9efc447f95875e37f936286beb88b11108820e12c265158aa557de6d47e77. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLCQ60146605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f30d8721dc3dae4462cfb6551ca6866bcec9951c2bdcca211d0958b81fea7b. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/NLCQ60146607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907dd7537bdb81b3ac73c792de265359607dabee1533c0cab4a5ce135ab13bf2. 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/NLCQ60146610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a0c30f0ec28685770df30c36952c6de2b63fdb7743bef5eef2a398dc63c494. 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/NLCQ60146611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09702891235dfaeb82d7c39b52425ab3fbbc5493a18a32c71ac987a47cd56e65. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLCQ60146612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780d10cb8a15a05de6b03647f0606f4ac10170a5aeb62535bf2af7c18945e74a. 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/NLCQ60146614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd336b6a6f7bfb38a968fb95270237a027761fccf97cb0f7c6081a5bd902bfffa. 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/NLCQ60146615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4ba9d8a09423b0c4775d9046670a39a5e39e0ac8c013ea01a51b930546e1bc. 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/NLCQ60146617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd823ea759911d7ffb56eed6acba4a69c0e43fd92ab300fdc448849a34d39c2. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/NLCQ60146606.
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 0xe92c97fb741b2122ff05452acd2f55de9e38eac972cb1238a8e9ab80a1f7c34b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLCQ60146608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b2b88f5e33133c780319dee964abdd3f86d001a35a1c977f99e345ced4b8a0. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/NLCQ60146609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51d4db77b41377cd2352046a377a48833d7054e21b4ac78a7a3f88e0b84d52a. 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/NLCQ60146613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafea30ba547903fc9b71d593d8674a67fc132e8bdcc548616ec950a37b1ae1e. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/NLCQ60146616.