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 0x82aeb6474b4a24c5f6480ccc2b468108e9b8c3a653d76fc4e4d527c257f5f8e0. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce40e9d5-42e4-4004-839a-782f78f36513.json and https://artists.proofprofile.net/proofs/artist/ce40e9d5-42e4-4004-839a-782f78f36513.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Ceremony of Carols, Op. 28: VI. This Little Babe
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 0x9caac08702a433245f97648738636ffebac929f683fa6255cc39448cd63406fe. 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/GBARU9600083.
A Ceremony of Carols, Op. 28: I. Procession
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67999ad0a131d36123c9004c6e0939d14f05fc5accb4e94666306b21d090e5b. 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/GBARU9600077.
A Ceremony of Carols, Op. 28: IVb. Balulalow
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01069a549eab6a536df10fa540b08ecc66fdfa1cfa914b96247d807288514df0. 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/GBARU9600081.
A Ceremony of Carols, Op. 28: III. There Is No Rose
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e95f292f55911128ca07986b9e593ba2aa1ac6cb12584cf3bce1b0ea161c106. 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/GBARU9600079.
A Ceremony of Carols, Op. 28: II. Wolcum Yole!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e82f82ba704cc4ed87a80d693d46eb0b0c42ae82290ff1776db88835eb96c11. 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/GBARU9600078.
A Ceremony of Carols, Op. 28: IVa. That Yongë Child
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d133bae82db9b3cda2b505f241f8f346d28ed990b5ca0c94a92f9109553866d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBARU9600080.
A Ceremony of Carols, Op. 28: V. As Dew in Aprille
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1aec1a63d506674b0463783acd9fa72e8e317184b5c59cdde52b64188ef1675. 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/GBARU9600082.
A Ceremony of Carols, Op. 28: VII. Interlude (Harp solo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2399938454659e1e9360d62f392113725fdcc60297d5286551ef4ba774cfae. 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/GBARU9600084.
A Ceremony of Carols, Op. 28: VIII. In freezing winter night
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f40798a5c5f2cb2fd78aa80c43cb30842e0f90685badc83422dc0badfae9bf. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBARU9600085.
A Ceremony of Carols, Op. 28: X. Deo gracias
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b9040a759b0e5f7ed865755bb5186574a022fcf88f159ddc0f6c72daab205e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBARU9600087.
Rejoice in the Lamb, Festival Cantata, Op. 30: Hallelujah
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8509cc52a4bfebbf5254b2b24f18eb1828bd0aa669220519e29c664379561715. 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/GBARU9600092.
Rejoice in the Lamb, Festival Cantata, Op. 30: For I will consider my cat Jeoffry
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c34d6fe292b525f6762c740c2ee6d555756c3f1dc0719efa9493e9fdeea4f74. 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/GBARU9600093.
A Ceremony of Carols, Op. 28: IX. Spring Carol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43cb708a3ba6a4e1641f9145c6ea2fc72722dff7f9dad9ede8353d549f2535b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:46:43Z), 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/GBARU9600086.
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
A Ceremony of Carols, Op. 28: XI. Recession
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7a35c4cc4f6b7dd389a98bd1d84c8b79648a74cb0334c3ccb1d237cfdf624d. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBARU9600088.
Rejoice in the Lamb, Festival Cantata, Op. 30: Rejoice in God
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe60cd5bfca14672fad0533a35f74ac973784df165243b38c887db8fc28b30d. 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/GBARU9600090.
Rejoice in the Lamb, Festival Cantata, Op. 30: Let Nimrod the mighty hunter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6740824b17f0ace16809d1078693df594be9c2cf246707570ce1f1ac888d80e7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBARU9600091.
Rejoice in the Lamb, Festival Cantata, Op. 30: For the flowers are great blessings
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c27d6038f9e4149c7261dd74c97b0f36586b10e94b38384ceee275c8936901. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBARU9600095.
Rejoice in the Lamb, Festival Cantata, Op. 30: For I am under the same accusation with my Saviour
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a1025d921dab0cbebf240a1d19eb26cee98fdbf0b000570c2e3d7b0a0c41b5. 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/GBARU9600096.
Hymn to St. Cecilia, Op. 27: In a garden shady this holy lady
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6381c9fd28f947dc6fb114cd3b4d38259aacfe49ef4deed9d1ab6ea0a7c3457. 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/GBARU9600101.
Rejoice in the Lamb, Festival Cantata, Op. 30: For the Mouse is a creature of great personal valour
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c49b9a31a6de0224bc3cf1678e06dd8a42b194dec4764f66c66b856461bac1f. 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/GBARU9600094.