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 0x66c0a5267a972a59f1ab4bc07ed19952ea8875ff9b55bf5aa61a3d6457cccd8a. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/031bd50c-4701-4ecc-a8b2-85b8843179ef.json and https://artists.proofprofile.net/proofs/artist/031bd50c-4701-4ecc-a8b2-85b8843179ef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Let all the world in every corner sing (Luckington)
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 0xb4f76c1ed1f578d2da10a1191342dc6a961e050d193baa678c58c87c3eb6f369. 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/GBAYD9600640.
Praise, my soul, the King of heaven (Praise, my soul)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b41ca59cfe7ffdd8718744274fa6a868e23df1337516f7e5ab8e61d396db15. 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/GBAYD9600641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cdbd8d40f9804c3b499c6ac9541e4611cda5c5c257291cd14b447589d8817a. 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/GBAYD9600642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9705716ff4b22eeb78d54a6661215042cb29c24bd408722a96bead22710db225. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYD9600643.
How sweet the name of Jesus sounds (St Peter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c25af56121814cc95bc038e509ce73b57e6eab71ef62a95a9c2a74935bd5556. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYD9600646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebecb65e0f0a91b8cfab96cbfbacf8ac65f59a216a558230a9cad5a46e2c336. 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/GBAYD9600647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cac6c88872b23a040239c0a96ab9a780d717c5220f493f4faaeadc8bb56f18. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBAYD9600649.
Vaughan Williams: For All the Saints "Sine nomine"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc8d770407f2a4bff8ad5e0f83990e5d75949b4a0f54a35c3d4533af6bba032. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBAYD9600650.
Praise to the Lord, the almighty, the king of creation (Hast du denn, Jesu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb990dd848f51655b5a8a499f654d932936f83f1e7e51c25320b3ea227bdfe923. 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/GBAYD9600651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be44dc020fb5bd4fbdf62b4adba2755c20aad904d431771fe60389938cbb5b0. 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/GBAYD9600653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23d4657bb0aacf63c111339aee1d08a55996a83af4f56761663e48a6b6ea1f9. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBAYD9600654.
All creatures of our God and king (Lasst uns erfreuen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d042050f3a6900100cbdec9120880b3cf6b5e0d737f7890d713dd2c5eae7b1b. 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/GBAYD9600655.
Jesus shall reign where'er the sun (Truro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a89df409a4e11096a08c4793e0e1b5ff9e46d1e945a60ddba8d47e38def3da4. 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/GBAYD9600656.
When I survey the wondrous cross (Rockingham)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0da2f7995f8ba11f412dae476c7aba91b67f83fa1c937f0722a506b72c647b1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYD9600657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d8753e7c503ce07608b314a7543e698152e9d1a769a5970bc469bd05c6fc01. 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/GBAYD9600658.
The day thou gavest, Lord, is ended (St Clement)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f86c03a1b1af935cf750f302f7afe47a8ca9e638a3a370767406bb66d99e8b. 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/GBAYD9600659.