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 0x628dcb945d33d4771cc4efddabf740fc7ad75c2b5345a6d46567a7ef7165585e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/770d523f-8448-40f2-ab40-f537c44e4da0.json and https://artists.proofprofile.net/proofs/artist/770d523f-8448-40f2-ab40-f537c44e4da0.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 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 0x7fb3cc41d33f16ca3c86b66c52b932c7d53f2526acfea71a09e5b2ce51b12948. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEB959002701.
Orfeo ed Euridice, Wq. 30 (Excerpts): Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7106c1d078cb3ae2660c74fcbd964c07a441aec723c16893e2ca0092caf27616. 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/DEB956439101.
Alceste, Wq. 44 (Excerpts): Divinités du Styx
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f036f6b96235eb6fb42e396c01d67dfd9a2bb19b83b27238c2ca4a2e89bf45. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEB958202708.
Orfeo ed Euridice, Wq. 30 (Excerpts): Ah, se intorno a quest'urna funestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9a22f30d25dfebb30c200dcab2d394c816487499e6b008771145db29cf4698. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/DEB956439102.
Alceste, Wq. 44 (Excerpts): Vivez, aimez des jours
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317dfa401889bc8665948678b4bcfaa32b23e19e98cf194106aca69471b43250. 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/DEB952020013.
Orfeo ed Euridice, Wq. 30 (Excerpts): Chiamo il mio ben così
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98175043ebb43c90c9de88341e8e558f1e40e4ce7ab5b3647e32f2bcd42db1e. 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/DEB952020011.
Alceste, Wq. 44 (Excerpts): Parez vos fronts de fleurs nouvelles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73e913c0adc0613e13098a1b4d707ea7a7b5536e4db0029c482f5fb0175d0ef. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEB952020014.
Orfeo ed Euridice, Wq. 30 (Excerpts): Gli sguardi trattieni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9828d908d95320d5d93c8486103d6389183fed774342918c752371d2ecb36e. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEB956439113.
Alceste, Wq. 44 (Excerpts): Vivre sans toi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3c0f543b1212ad056c93586055ff7cf81a7a233af2e1f45abd8770af292f83. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEB952020015.
Orfeo ed Euridice, Wq. 30 (Excerpts): Dance of the Blessed Spirits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886f697d237ce7e0116f64c78be1595f79202250d276edd3724d8baa74f8db68. 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/DEB956439126.
Alceste, Wq. 44 (Excerpts): Recois, Dieu bienfaisant
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23189a77218010a1052297b1b11da25d63bd21d7bd1d620aea1b79b62fbcb00d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEB958202720.
Orfeo ed Euridice, Wq. 30 (Excerpts): Vieni appange il tuo consorte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bc8bcb0f9dfe4460047b37ba7b0b43157e68fc44a35af2ca411026bf977ed2. 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/DEB956439132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482055020280374c348d75c42696dc2be318a3f98a65510c482f78542149f883. 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/DEB958202721.
Orfeo ed Euridice, Wq. 30 (Excerpts): Che fiero momento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a72da4ecc4c55bad91829c8f1d6648bd4242e446b1dbd550b65742f41810dbd. 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/DEB956439134.
Iphigénie en Tauride, Wq. 46 (Excerpts): Des noirs pressentiments
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e27298b64a8dd64e35f4c079a15f03bf21c835e827575807e432dcd64949f34. 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/DEB952020016.
Orfeo ed Euridice, Wq. 30 (Excerpts): Che faro senza Euridice?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085057511b1d50304ed322397d376174b97d89691e67f870009d4ff53ee3993c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEB956439136.
Iphigénie en Tauride, Wq. 46 (Excerpts): Patrie infortunée
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca083efe7f40f101ae8af86b11410317d8a1ef94f5073177549450881c4f774f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEB952020005.
Orfeo ed Euridice, Wq. 30 (Excerpts): Trionfi amore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4902c18152621f956e16a1e7ee128f6b129c69b25b8846184a5fcde2ceba17b. 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/DEB952020012.
Iphigénie en Tauride, Wq. 46 (Excerpts): Et tu prétends encore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e738afbf07646633916c38e76ca8fd9db409b1b61a989f7d4b5cfa1e2dcf95. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEB952020006.
Paride ed Elena, Wq. 39 (Excerpts): Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a31374a1c6b59337aa681b36f9bb72fa24953d8cd0007c1fd668d7ef92ef5ff. 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/DEB958411801.
Iphigénie en Tauride, Wq. 46 (Excerpts): Divinité de grandes âmes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7286c46f29196312046c28bc263bbd6bedcf401bdf4b3b166649f7af7c3f27a8. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/DEB952020007.
Paride ed Elena, Wq. 39 (Excerpts): Non sdegnare, o bella Venere
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71797d177be603dc61befea3443e396e756c88aa50018ac1a6bdfafe7d96fd06. 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/DEB958411802.
Iphigénie en Tauride, Wq. 46 (Excerpts): Non, cet affreux devoir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4439e1a4568f1147cd25db833ece0292115fe7d75b06b3674bddd10db011e26. 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/DEB952020008.
Iphigénie en Tauride, Wq. 46 (Excerpts): O Diane, sois-nous propice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4344e3a331a9c8ab11ead4fd1a6eae712b396b719826599569c8648532db4d39. 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/DEB952020009.
Iphigénie en Tauride, Wq. 46 (Excerpts): Les Dieux longtemps en courroux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0899a6f23f8e5001004ad1226b05c03a2523e51f7803ec671a634267548f91. 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/DEB952020010.
Le cinesi, Wq. 18 (Excerpts): Son lungi e non mi brami
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d913e9cf6b50edb390a5a0c8d560b907f4b6c3927e50756b6c74290930da50c. 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/DEB958917805.
Le cinesi, Wq. 18 (Excerpts): Voli il piede in lieti giri
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1a77ca2cc02daa2ca95c2bda6b54bde1a646e8da050eb04e949c8d1b9c2e35. 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/DEB958917811.
Hoffmanns Erzählungen: Prologue: Aus dem Becher kommt der Trunk
Hoffmanns Erzählungen (Hoffmanns Tales) Sung in German
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf858226e6ac91f4d5c9db41c620755e69ebdcb6b6217de7c8e9cf9d213b4dcc. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USB8U1804598.
Hoffmanns Erzählungen: Es war einmal am Hofe von Eisenack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6001f62bcc0c0b1dc9860c4295364f09b2020c9b742b5e3bed0751d168a32a. 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/USB8U1804602.
Hoffmanns Erzählungen: Pfui, dieses Bier ist abscheulich!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521dbcb773b0d6dae456cb48263a1b635e8088edd12a4e25df6d3620d74b98c0. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USB8U1804603.