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 0xca52324f688302b423d0b855d20dfd2019c2a8a15ec338f273ba9005f2ad1fc5. 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/86036c47-0a6f-429b-91e2-17bdd69c005d.json and https://artists.proofprofile.net/proofs/artist/86036c47-0a6f-429b-91e2-17bdd69c005d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Guided Tour of the Baroque Era, Vol. 4
A Guided Tour of the Baroque Era, Vol. 7
Messiah, HWV 56 (1751 Version): Part I: Sinfonia
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 0xc15bb053ef4542478ac32f659a443b21cd578052122942d0c36720c235c0bcd1. 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/HKI190638901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc8407caeaecc5a5676191161e4e26c627fe1191021332d0b8d6bda709e3eeb. 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/HKI190230601.
Zadok the Priest, HWV 258: And all the people rejoiced
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87088b400af18509604756658c11aec60b4031605ae4874fba9df7555f9d8132. 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/HKI190230602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8de4279ba36e96839fc7675a05429e1c99a774e99abd947cd9077709f8ab8e. 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/HKI190566801.
Laudate pueri Dominum, RV 600: Sit nomen Domini benedictum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89a054c0879d7fe38c73cc35170301aa7fe489e447a58ee1a4218b2b1fac16d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI190566802.
Laudate pueri Dominum, RV 600: A solis ortu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1cbde104a11874648659d08d876bb8151b7ca6ec64055839292e302e40ba38. 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/HKI190566803.
Laudate pueri Dominum, RV 600: Excelsus super omnes gentes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2630cd15096b4481f414b2df43da372d15ced8207e32938c67ed8386871e2b2e. 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/HKI190566804.
Laudate pueri Dominum, RV 600: Quis sicut Dominus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc140f01791f37dee50cd73d108e57b0af4e6b8ff91a0ee34cd93d34e405aa2a0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/HKI190566805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20f4df6f7d63227ff26b00ce929563ebe833fb25d1fa694ec421b2b44bff7a8. 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/HKI190566810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756b8902266973cb72e8c43f9adfe3fef382775a869114ab6cdea817670f9367. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI190566811.
Stabat Mater, RV 621: Eia Mater, fons amoris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1886d6470b8264b349a8a97babf80d730f9148b0c4bbb0075c2f70c7688e7588. 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/HKI190566812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c43890deb286c7a0f7d33eb00a2fe5e30820eac8b366d3b236a949df0b69ab. 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/HKI190566813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1f33baf11f9ef05c00734307bac424ce4a33f1b6743a24cd1477f616d2088d. 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/HKI190566814.
Clarae stellae, scintillate, RV 625: Coeli repleti iam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf873703e1c3602ca64721862c9e4a5fa7eaff3a1561134def34305dcc7a9c33d. 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/HKI190566820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf860db2cfaaa9a193e234bbb3e00533f149d63fde2d8b438bd0bbbd451a7cc. 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/HKI190566819.
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
Clarae stellae, scintillate, RV 625: Nunc iubilare
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5fb8cfe9440c15553a55616eea69e0cce363495613f9788a9691d2ea312b48. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/HKI190566821.
Clarae stellae, scintillate, RV 625: Alleluia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1673ed53ab214626739aa9e032837b01097b0b7f71cc18eb30ab6ae3f73aaa44. 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/HKI190566822.
Charpentier, M.-A.: Messe de Minuit pour Noel / Te Deum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762e50825b73e457b62814aa78096b0aa197ad41ecdd1fd88c5e018a00679b32. 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/HKI190305001.
Messe de minuit pour Noel, H. 9: (Kyrie) Noel: Joseph est bien marie - Kyrie eleison - Noel: Et sy je la revoy - Christe eleison - Une jeune pucelle - Kyrie eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5fc9d7b3d218e7a525c6ee4e8fa553e6476e831984d02574035edc3d2e24f8. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/HKI190305003.
Messe de minuit pour Noel, H. 9: Noel: Laissez paitre vos betes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd94b32b4b3b317e47496107a60c59f108ac1c912761f6bd72a4e5c93746258b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/HKI190305006.
Messe de minuit pour Noel, H. 9: Sanctus and Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14459f0b84b1bd26fd4c416eb8ae79b3e8a7517fb8655a9e48f8cf498f66dff. 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/HKI190305007.
Messe de minuit pour Noel, H. 9: Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0763c00d2d5e34cc945e64c25273dbe2f03e0f5ab4185d0a90cd385c11f1682. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/HKI190305008.
A Guided Tour of the Baroque Era, Vol. 2