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 0x0f8db69b0a420b4e52d809da38372a7cbac98da9ccad8ccb207020935c75406f. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e51ca6dc-ac28-49c7-8a3a-2137ab028752.json and https://artists.proofprofile.net/proofs/artist/e51ca6dc-ac28-49c7-8a3a-2137ab028752.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Song of Beasts. Fantastic Creatures in Medieval Song
Monastic Chant - 12th & 13th Century European Sacred Music
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 0x2f43d3c2a8391d27910b91bdcc9baf7b55c45d19b0c3252492139db999429981. 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/USHM19615701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d6eeed8d10f1667c019c442211143fff998cfc8d7e1f1e7a092e657983a78f. 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/USHM19818505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb0d4b46f98b5059c2b5f09e62b4ca7a739905706803f4d2a5dc61289edaf6f. 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/USHM19615706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6b0cdde6a1bca6d5c8cec2daad757ea2ae7c1d4719595404bd3d2f29deeb3b. 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/USHM19615707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c6d74d25d3b494c4dd53adf20d8a04c93aca76d878cae912ef02d82347487b. 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/USHM19818507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb492314b1392734df48ad1f32240fade58a444b64c72a07b21038b6a1a4c1edb. 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/USHM19615708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e399e51c529faadf0f17059098e4f9e2dee61d80a3a0b15238e35ab293410c2. 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/USHM19818508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa199dfa0a0544d7c60c253f60ec6bc834114873e53553c7cbb82451b24b71afb. 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/USHM19818511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb032b44a6626326c86ecbf3d99e9f61fa5192fa1dbb4186186663eb89c88ba57. 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/USHM19818512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f74ab0f6c485046d90073039f06ba321ff186e6fb339b844cc2262829e804f. 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/USHM19615713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd4a930156261f7842252004a0cb571754c07e88a50e3c03cf0d9b58c0e97e7. 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/USHM19818513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdc0adcb69b7c478a618c65af891584a659144f2fe8401e8f18a93550a85935. 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/USHM19818514.
Thomas gemma Cantuarie / Thomas cesus in Doveria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28892f343f3cf88c528c36938f00e56ebba0cc758f082b39aa34b3668227329c. 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/USHM19818517.
Campanis cum cymbalis / Honoremus dominam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666d93aa94b840718566f551abd9741110d1d5d9cefd77a164e1b36eb192dd77. 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/USHM19818520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdccd47f80dc476d16586be55637ea684ef5b7a94b157c579486fdd8d9a1436. 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/USHM19818523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26db751c40c793bb179e51e1034be2f64a196bc4c552662e61e5cd5d75b23635. 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/USHM19818528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6764fc50d12eccf5284c90b236c20fddb156b361804a9d1c3abc93e507e955. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USHM19818525.
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
Knights, Maids and Miracles: The Spring of Middle Ages
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8992e952e7641dc6b7c4f4c6962742769cfa73ad6a8bd9d54b2da6545c14a7. 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/FR46Y9233605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb414ab533e31c569486908764780d63e8fe34c848af5810c5276fa1db035b33f. 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/FR46Y9233606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d1324506579376abfcd713079099f7864a06d9b44f7b474b73cf15aefb4ca5. 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/FR46Y9333220.
Parle qui veut: Moralizing songs of the Middle Ages
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d260633f5d642a06bad57408b379898656059c2487079253e6e777fded30c1b. 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/GBASH1752902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c6f14c84c67abc83f33c2228aea63dd92959d7d4d326e6bc15271098788815. 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/GBASH1752905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6761c4cdab72f389695c77025bf3e223bbe900d24dc76b204abd4e76ef1979e9. 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/GBASH1752906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f688a0db9461be32eb695e4f33af6f1cab51df1bbf361eb89a1c7fcb92db70. 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/GBASH1752907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78457b3aef264e0c72f0a4852d7610fa43a9e31be32a14c7ec025e32d4190f4. 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/GBASH1752909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0da06e02731c0f8c832d49dc52249fda0eb64d5506ba6c38ddd4d20b6994e8. 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/FRZDG1801288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cc54265ca1d2a9ced0f79cccc4072e660f5a1903465ecabbd5a180625bf3f1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/MX2831000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f112193d08eb6782bfb6d13897ae719c451f011cd6b4f42a187de272a843bc5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/MX2831000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7d856da08ec35ae3b2ce665c0b27ae24d7e040df750d98b138a0a7e2cd754b. 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/MX2831000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ef9f2844a389b344f476816c39a33c5f1bfd572930db1623c78b7ca7eb1b50. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:19:22Z), 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/MX2831000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24a210004b7d7d88ebb722065bc349eaefae6ad9ed16139395e662c3a08b1c7. 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/MX2831000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe292c98c5b1a589bb2425aa9143847c55ede251c1daf9bef537084e2e24704c6. 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/MX2831000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d7df55140f50d535d78cb6640f5569a851bb118e11034e05d013883aaeb9a5. 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/MX2831000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786b051971b3742273ce19cc68cefa81de6a1f51762e7f44577d2ce3a6762246. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/MX2831000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd014d54cd3b5211df5653d08c9549c5c8e4f9cfc8fd67a17c79ca237c5891d83. 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/MX2831000020.
Firenze 1350, un jardin médiéval florentin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b66370fa96a0a42ff992721b24584964c60e03f48eb690bad5f10be11daeb9. 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/FRZDG1901393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f78a883e0c17ba5ec534ede21a45161e204d677cb4b538c68173564643438b0. 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/FRZDG1901396.
O tu chara sciença: La musique dans la pensée médiévale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d1324506579376abfcd713079099f7864a06d9b44f7b474b73cf15aefb4ca5. 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/FR46Y9333220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5eb23ebac1a321c8cbf3f3c2119ef25c84b25f6f11d7e71e0630d8e392abdc4. 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/FR46Y9333208.
Isula feminarum: Résonances médiévales de la féminité celte
La musica ai tempi del Patriarcato di Aquileia