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 0xd738536b8d886d019d8fd6b2c3e0e9fd865e5f53d41e416fd2c9d5e167cadfc7. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3116130-bb60-43ba-83f8-e7e2cb02a9c5.json and https://artists.proofprofile.net/proofs/artist/e3116130-bb60-43ba-83f8-e7e2cb02a9c5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Schwarze Visionen: No. 2, Hymne (Live 2013)
2 Composizioni corali: I. Il giardino di Afrodite
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 0x2a42fd8c462982b70082b302b05767b7b2a4fbfc8f3d0493eb235b99e8e526b7. 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/SE2FO1800204.
2 Composizioni corali: II. Piena sorgeva la luna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc089a00ef21dda048edf31b218ad91519a80cb2fdb7bdc71b32b2f97a39b468a. 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/SE2FO1800205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147b50d2de35178f3481c96a91abd43395c6b896edb709063cc352c1948bfffd. 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/SE2FO1800227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa971e567accbfa52f9c08e48c70d1adb6055c8048c31f57e1d564c75235feff2. 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/SEVAF1500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3032357e3564e7fc81e69a518d92f6072b4d2a6b5a181e75ce86ef1276d4b2. 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/SEVAF1500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102cc3e8436d3ca887525b6681cf66938bc4ca7b97a433ebea60957a4abe6d45. 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/SEVAF1500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e915262d0b4371dbbe25aabfba475a16bf03826e82d80e8374e1ff52dc545ce. 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/SEVAF1500114.
Concerto grosso in B-Flat Major, Op. 6 No. 7, HWV 325: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cd618b95a2c8d050d9b3c2075f9f9f9dd478e012cb3a835b014fdc6917a3c3. 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/SEBAA2101801.
Concerto grosso in B-Flat Major, Op. 6 No. 7, HWV 325: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa204b527db9f88889c10cc52a0bdffce0833a110642efd0230ebcb89de24b3bf. 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/SEBAA2101802.
Concerto grosso in B-Flat Major, Op. 6 No. 7, HWV 325: III. Largo e piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2c3877169e346b31b036795b7a4e40d29264d550f300237581bdf1b3862fc0. 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/SEBAA2101803.
Concerto grosso in B-Flat Major, Op. 6 No. 7, HWV 325: IV. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc294e2a51bafeb39c71eca7de72a145f7522b834e105e3b041dfc4bb9616203. 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/SEBAA2101804.
Concerto grosso in B-Flat Major, Op. 6 No. 7, HWV 325: V. Hornpipe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a759a5bc07512b5398f6c6c3abc820e69c895f7c7f7bfb487ce80de0630eb3. 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/SEBAA2101805.
Qualities of Darkness: No. 1, For Behold
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540b8a15ab4f1e3bd120b32d3832ea14712d24588256d71ee9885785b4321abc. 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/SEBAA2101806.
Qualities of Darkness: No. 2, How Dark, O Lord, Are Thy Decrees!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7003ebd48e2c66548fe35609c038d07fee251885cbbc1eff6cbef515591f1f. 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/SEBAA2101807.
Qualities of Darkness: No. 3, He Sent a Thick Darkness
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0eec7fbf9989441d5d6a5ce1ac783e07f7a179243ed90cdb593b3222a75b1dd. 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/SEBAA2101808.
Qualities of Darkness: No. 4, Total Eclipse!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdc9896a21e343530fdfa65cea2c5ea04b8d9834809579da8785bae16303b5d. 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/SEBAA2101809.
Dixit Dominus, HWV 232: No. 1, Dixit Dominus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46cb0c51915ed87b5ce14307a3039deba44d8e134bbd70ad8fbc85f2d7b05f5. 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/SEBAA2101810.
Dixit Dominus, HWV 232: No. 2, Virgam virtutis tuæ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a9ecb3c6b629418ff69df134332d49c16dd4b7c99c8ecbec042d34a359ec30. 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/SEBAA2101811.
Dixit Dominus, HWV 232: No. 3, Tecum principium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c86e144cee4c724c88d99c32700c846e17dcb7b5b222de35ca9d77250a5f2d. 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/SEBAA2101812.
Dixit Dominus, HWV 232: No. 4, Juravit Dominus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9805487d8ff8e14ccb31679bc31a37310a930ce7415f439b2efad589c5f3e46c. 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/SEBAA2101813.
Dixit Dominus, HWV 232: No. 5, Tu es sacerdos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514f1ae6ed04ee11a745a9d2c6a9251ae83a8d9cea40a97064a8954036f6739f. 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/SEBAA2101814.
Dixit Dominus, HWV 232: No. 6, Dominus a dextris tuis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751c8ec687992d50cc1ebf559af3c90ed5be3adcf828f743316f287dec9cdd8b. 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/SEBAA2101815.
Dixit Dominus, HWV 232: No. 7, De torrente in via
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b920a34f2d6b6bda9c61631d9bcdf36c8d7e3bfe4654f67e921fd3e8355a535. 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/SEBAA2101816.
Dixit Dominus, HWV 232: No. 8, Gloria Patri
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ade9e73244af99ac9b3f6cee0662198d324eddc43af0344d968c503842cb0d2. 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/SEBAA2101817.