thumb|William Henry Monk William Henry Monk (16 March 1823 – 1 March 1889) was an English organist, Anglican church musician, and music editor who composed popular hymn tunes, including "Eventide", us
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 0xa9e6de85912feb4c77f6a7bbb89c6546a16d498a15e821f218fcb516e47853af. 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/e54762da-3e34-4004-8726-ed74a032783a.json and https://artists.proofprofile.net/proofs/artist/e54762da-3e34-4004-8726-ed74a032783a.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 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 0x791f4a7e280a764689916c79b4ba229f3f78ab4ce8a53b6526d94686b8933760. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBAJY0339801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a66d3267d504bce1b4346443e56f5f98fb5bb10d594fc291cae9888a3d0256. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBAJY0339802.
Crossing the Bar "Sunset and Evening Star"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e31c4e1b7a9e8c070c713e17a17aa695740aa125934f0dc13503cc7ad4deb1. 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/GBAJY0339805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3765c342c20669fce08348ce5b83a85f3211d782cd3b9d420877a188ba70ab01. 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/GBAJY0339807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b6869c9319709a2c7dfd19c43da5759cf0f9951ef6d1609ca8af5291f75f35. 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/GBAJY0339808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679dc7d8932f1280d889e43755c75d93d339c38830ee4bc005bbc54bf6376822. 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/GBAJY0339812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335f399b01ba394d662c735596016f81307ab55bc29d2a350881736a8d4713ff. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBAJY0339814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10286c73cd7c6c044b57bc0de44ead9e290b2ef1710d5cbf8b469d60c0d38420. 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/HKI190246413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403a6d1646db9980014cc609664e5f255b0a319ce0795977fb07d06fb540e6f2. 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/GBF078540615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f8158582b45ecc8dce878f78e6cdec32d57fd3657a260cf8b40c2ce19bcc1d. 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/USA4N1301865.
U.S.A.F. Protestant Chapel Choir, West Ruislap, England
Children's Choir From The Kenton Methodist Sunday School
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806f013b500b0837e1a7fc452e58eb2081c5f8a58cae12a69a4b08be7e60f72e. 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/GBF076311580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316189c7bb93c7a1956896ea1fa662bf734e2171ce50925b831da191561ba2d2. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBF076810830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe054993052904354b61b0ab36929466593861d0e8782f74f81dcbc3d3d632bf3. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USA4N1301417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf6f0aee25c37c708f53fa77a0f06c494626dffb93999276bdc764bc58c1dd7. 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/GBXUX0701807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c45a5f339adc8697c245150737dbc682064cf9bf168aa4c0e2b7287b6ca44f1. 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/GBEKZ0300036.
All Things Bright and Beautiful (arr. Richard Wilberforce)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c26dd1d9226bc56b0b91ed83dcf111698f0ee1db48445961d65b7e26776163b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBLLH1957202.
Honor, Loor y Gloria/All Glory, Laud And Honor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f05152fa5ceff3f6c6bd97532d2ee7a5e06f4dfd780f71c4c1be24bc166aad. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USA4N1200948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c9c3a9dcbf9979d222ba92c181b1612f9ea825b3d9e427339383db56ded511. 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/USHM81065575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40baaf6ccdccf466db7feb1c5edb25981c40af75bb2af1e4d73038ed62182756. 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/GBLLH1957216.
Merton "Hark! A Herald Voice Is Calling"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5943158849f4be6a93d4330211db36c2e6e6971e2814bc5ef78349b8dcbb47ef. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/GBXUX0870518.