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 0x43a341a1b096bdbd5f6e601af4091069d00c0dd89cab37286e203d53d480969c. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/178177c7-6d62-4ace-a9cf-cadcb6537f86.json and https://artists.proofprofile.net/proofs/artist/178177c7-6d62-4ace-a9cf-cadcb6537f86.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Amarae morti: Lamentations & Motets from Renaissance Europe
Incipit oratio Jeremiae prophetae: I. Incipit oratio Jeremiae Prophetae
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 0x0dd8623ce4e4329ed383dbc2d581a13816d344e1f6429e843a46527926239fb3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827901 — a six-check JSON result.
Incipit oratio Jeremiae prophetae: II. Recordare, Domine, quid acciderit nobis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455a2671e01ecde22e9eb1d46f4c30369ee458a4948ee61fa624902cf166eb63. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827902 — a six-check JSON result.
Incipit oratio Jeremiae prophetae: III. Pupilli facti sumus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbac8914802335d3cb206453133b85378299e3aa2e0fcbee17818af18d45069. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827903 — a six-check JSON result.
Incipit oratio Jeremiae prophetae: IV. Cervicibus minabamur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1cde7f7f1ea728ea571caf3f0ce4ad15042554af7d6c0d2aaa12ffc2c2c72b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827904 — a six-check JSON result.
Incipit oratio Jeremiae prophetae: V. Patres nostri peccaverunt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825180c3c89bc9ed80a21858ae8b21cd8fe3f9cb5c0b00d2025779a6ca1eee9d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827905 — a six-check JSON result.
Incipit oratio Jeremiae prophetae: VI. Jerusalem, Jerusalem, convertere ad Dominum Deum tuum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30563ea7b23dd39cb40583226068e3afb6c70023b5e46d09ba009979f41a1a6a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827906 — a six-check JSON result.
Media vita: I. Media vita in morte sumus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf887862f7ed40bb5fe644420ca0ebd86aa298eeeb53e57b6b177b52ae24170c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827907 — a six-check JSON result.
Media vita: II. Sancte Deus. Sancte fortis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfee5f89a204f4107fb43a27b65a4922405c14fbe9755c32b329cb5f1897edb1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827908 — a six-check JSON result.
Lamentationes Jeremiae Prophetae: Lamentatio III, Pt. 1. Lamed. O vos omnes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1578405023a6a535d6412f05bad1f24f259fb3e803c6b476392e4d3126e3b6. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827909 — a six-check JSON result.
Lamentationes Jeremiae Prophetae: Lamentatio III, Pt. 2. Mem. De excelso misit ignem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc19fd3a4712ac6a52bb0d7ae01f576a240f9449b2f29ab32101a66ef29c0f5. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827910 — a six-check JSON result.
Lamentationes Jeremiae Prophetae: Lamentatio III, Pt. 3. Nun. Vigilavit iugum iniquitatum mearum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2279d7dfb39054cd5356a7e3b733b58358a14fa06bd5461325f8ee54b14fe6e5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827911 — a six-check JSON result.
Lamentationes Jeremiae Prophetae: Lamentatio III, Pt. 4. Jerusalem, Jerusalem, convertere ad Dominum Deum tuum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5726ee3acf16f2a0c4b828be2bb648fa9be16583a9f4be4c3a3dd663420fa7d1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827912 — a six-check JSON result.
Regina caeli: I. Regina caeli, laetare, alleluia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7286492186bf089f2fd833087fe0c566d83bf1c42fdf415d314baf7d41b2bc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827913 — a six-check JSON result.
Regina caeli: II. Resurrexit, sicut dixit, alleluia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd59cc336a6cc56aad1532a8b5039e73ed79b9591143805d783776032195a707. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827914 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf02b8947b13e7c776ac8639b547d1457f5a5ad7741b36695bc6c8358eb11cec. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827915 — a six-check JSON result.
Vau. Et egressus est a filia Sion: I. Vau. Et egressus est
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc734ada4dd2aa7ec4b422df7b364c594b5f8e8205e020f18990ae443a1ef52a1. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827916 — a six-check JSON result.
Vau. Et egressus est a filia Sion: II. Zain. Recordata est Jerusalem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72bbf7ef5b0b219120b3a636805ced12f6b4800e663b20d66f9a17782fe3b65. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827917 — a six-check JSON result.
Vau. Et egressus est a filia Sion: III. Jerusalem, Jerusalem, convertere ad Dominum Deum tuum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ec93563cd458ee5e2b1089e7e6a4d9f07cd69cd13c616d7b5f23b8f8d57caf. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827918 — a six-check JSON result.
Regina caeli a 8: I. Regina caeli, laetare, alleluia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda39b5908065a3c395a000951cc444acd941ecf6867cb7c4901e352df2c400a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827919 — a six-check JSON result.
Regina caeli a 8: II. Resurrexit, sicut dixit, alleluia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27776429cd613101299bf64167f655a148056c870547ffd68fbe550b749f5af1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827920 — a six-check JSON result.
Magnificat primi toni a 8: I. Magnificat anima mea Dominum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869a754618baaeb465a3e6b30b8c77edcb9dcc9e941a82942cd798afe4daafcb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827921 — a six-check JSON result.
Magnificat primi toni a 8: II. Et exsultavit spiritus meus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a55d4693f1f4305a2bab8b9c4019f94c88d58a5030498a94b73712f172adf68. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827922 — a six-check JSON result.
Magnificat primi toni a 8: III. Quia respexit humilitatem ancillae suae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7eb9fa4bd5ef819e19d613cd91f91731c60333b35624fe152a2baf383bb1d8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827923 — a six-check JSON result.
Magnificat primi toni a 8: IV. Quia fecit mihi magna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1ac1202849758b446c9f39ccf22a0125d2f77021a81ead57753310ea2ec88c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827924 — a six-check JSON result.
Magnificat primi toni a 8: V. Et misericordia eius
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f49098dae9159abf7b99cee4cff4b0831e70bf4cf3de3c8d51f18acd79694d2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827925 — a six-check JSON result.
Magnificat primi toni a 8: VI. Fecit potentiam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed32fb1c76f98ccd87795d0ab6fdbe8ce16a6775e188f8f62c09c13eae29605b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827926 — a six-check JSON result.
Magnificat primi toni a 8: VII. Esurientes implevit bonis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685e98038352bd32dfd7e5888d77922a4e74c1690d792b085e436ff12d446868. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827927 — a six-check JSON result.
Magnificat primi toni a 8: VIII. Suscepit Israel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495ff814093acf92574ead080a89ec423be262330777f76fac15ff864cd9252e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827928 — a six-check JSON result.
Magnificat primi toni a 8: IX. Sicut locutus est
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4146aef859ae10bc44bce34ea1a9205d7af2f9a4852081736d0c78ecab388a5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827929 — a six-check JSON result.
Magnificat primi toni a 8: X. Gloria Patri
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdf37e397fa7068593dbe6df1635972199f706098e82aa5dd4dd9a60ecaf52c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827930 — a six-check JSON result.
Regina caeli a 6: I. Regina caeli, laetare, alleluia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6da6c8a722685e061389bb314732620fa7ff2cdffbc14ad9eab3ecbe5e4718. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827931 — a six-check JSON result.
Regina caeli a 6: II. Resurrexit, sicut dixit, alleluia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9906f15e80688f36c3347be0ea88910d9574dfaf644cee209098ff88a9162ece. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827932 — a six-check JSON result.
Laudate pueri a 8: I. Laudate pueri Dominum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e48b82da060264bc0c477772aa73500e1906b7e63053f882f1751638aff8f1d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827933 — a six-check JSON result.
Laudate pueri a 8: II. Quis sicut Dominus Deus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb5c2b707d1810ffc34717274ba417d98c38938f842db2120c300db57009109. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1827934 — a six-check JSON result.