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 0x0e9a5512fd461dde6bad2bc56ce4c1ce39ca0ba19014a4883e81ee9bb1ad1f55. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5bea66b2-d0a6-4be5-aa6c-608d4d19b49f.json and https://artists.proofprofile.net/proofs/artist/5bea66b2-d0a6-4be5-aa6c-608d4d19b49f.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 0x2806ffb937cbcce3cec1ac14e967f258032d5ac6c048b432987f1bdc7bc1a8b9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEX991121607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293572ff7dee900981392507e76fe034c88ebac218cfdc306ee02fc56bfce619. 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/DEE471600159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6c30517f9b08a9d8df2d9ca870a7d14ae3117678a31669ad99b7099d548a87. 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/DEE471600167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f10fba7fe2a0e5352fd2918bb1b4374a593035b968613b488ffe2042fdf11d. 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/DEE471600168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50da6718e5fd6be4ba8309f27f379966fc9789f35bfef1bebd02ba6a8b067ee0. 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/DEE471600174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e48e57cff8d4e773ed077b591d8a2ae23574ca3bde30fa8aaf0c5591f89aa95. 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/DEE471600176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cc90aa385dcc768dd4dd5a3b909f7030765167ad65ab6194f764bba602ec8c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEE471600160.
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 0x1faecb00bf8b80645b5d355a9aecfb5209426826fde45e372f6dd8c219f455ea. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEE471600161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d47ebf5499ceec8fbb9337fcfb4ced28f4339a5dfd22da87f01aaf3feb38355. 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/DEE471600162.
Von Gott will ich nicht lassen / Celeste Giglio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1017805f95fbbd527ffbf216f40320288a07d8e767e7f9d5c453b2b57ba0f707. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEE471600163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7ab1edb900f3d1c99cc30df46ffbc87f3592600d6400087091c7b25d246293. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEE471600164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73090d473bd9b134425a2b6f3e537050094d62f1bb0f8c9db6f339dfcaabd104. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEE471600166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc772227602aaf260e3de77d7eb5739d28c4dff91c9e4a58bfbb5c74bf596de67. 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/DEE471600170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0860722a227db2e27bd4144ef6249e80890f6354fd6ad46381304b0ccf32861. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEE471600171.
Dark Cloud: Songs from the Thirty Years' War 1618-1648
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad3684dcf9b91227c521f92f42a1c17b3878a40ccea6c38fa83c3de044f94ff. 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/DEE472300291.
Lumps of Pudding (Arr. for Baroque ensemble by The Playfords)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e248e74ed2a1fe5523684daa8098ac15403eddb9307ec3c0f02f51eeb293b8. 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/DEE472300295.
The Merry Merry Milkmaids / The Milkmaid's Bob (Arr. for Baroque ensemble by The Playfords)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffbaf4dc409270f16a8f069828a7d38681108ac1568169bb73143d8c34bd978. 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/DEE472300296.
Tobacco (Arr. for Baroque ensemble by The Playfords)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498db322aaed04598c255a14fd4f34a1bb7b122bd7a70ff059572d8bdf983903. 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/DEE472300301.
Mrs Savages Whim (Arr. for Renaissance ensemble by The Playfords)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3326a8913ab0b03fef117a8488c65ae5903c49efce1e434171f2427f6222f78a. 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/DEE472300304.
Twas o'er the Hills and far away (Arr. for Baroque ensemble by The Playfords)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9be0aa2ca02f1e574d96c66aaca1c2d6739ede3ab55a876fd70b8fecd91c55f. 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/DEE472300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828a06c11111c76d40a81ff48de89c5c090e40c13e076f2ec7ee0f5e1edabb31. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DEE472300290.
Cook's Humour (Arr. for Baroque ensemble by The Playfords)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7591622a28c9f2cae0fcef984358c3e012673bf40d3fcd7170bc39490bc4442. 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/DEE472300292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc395b0e16097abb3707b3de9d7599c2e0c37d4914d8022d309e4d0eb2cbc78de. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/DEE472300293.
The Glory of the Kitchen / Jamenko (Arr. for Baroque ensemble by The Playfords)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433139726b98adb7c222c6f3959ab23a3f9e92e601867925b2a731604e17138c. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEE472300294.
Northern Lasse's Lamentation / Sellinger's Round (Arr. for Baroque ensemble by The Playfords)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4595bfbf79d7a908013b1940e6bedda0acacd0c1878c7020053b9696555d84. 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/DEE472300297.
Though you are young and I am old (Arr. for Baroque ensemble by The Playfords)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabf30dacba0cd1c539e6a6a3efdcb68d14e0fa04ddfe862373aa47d84ed08a9. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEE472300298.
Dissembling Love (Arr. for Baroque ensemble by The Playfords)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae27ae8fb5450d91b9599c41ea4d53f180b63d826fb06814a36d3b353711cd4. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEE472300299.
On the cold ground (Arr. for Baroque ensemble by The Playfords)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876c43744b1fae38b5d8159941a4550b8549da5e70e4c2f9fad09fd8f06cc3df. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/DEE472300300.
Ginnie Pug or Strawberries and Cream (Arr. for Baroque ensemble by The Playfords)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e89972ee2d085098251a88349bd273ad3cc3bcf0bf8b8e7be4c47120c22fc3. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEE472300341.
An Old man is a Bed full of bones (Arr. for Baroque ensemble by The Playfords)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb951c66086ba77510d69d39fd520e863515a261bcfe365a184bdea7162fbc524. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEE472300302.
A Cup of Old Stingo (Arr. for Baroque ensemble by The Playfords)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07babdfea47e0afd278ca73fff988c763fb4699733732ed49a2f0c17009bcd9. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DEE472300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4635b9f8b0dd79fa3e4876fbfcbc728ffdbcd9cdbe7d1b72e984a22ac6baeb2. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEE472300305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4642890377a0da3e9b5eb22ac5f1d7ee38fdc9e58e5a2cb16a7da3038ba546d0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEE472300306.