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 0x01457033bc52fec61f817b3b115d5e04cd39787f6deca86d90f08e71a10fc5f5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09547afc-0268-456b-b687-27af0d79a2b7.json and https://artists.proofprofile.net/proofs/artist/09547afc-0268-456b-b687-27af0d79a2b7.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b59958ba06fb3c4612f1543b1a1e832f7d6be584eacf030af2ddbff185383b2. 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/GBAKR8610303.
Requiem in D Minor, Op. 48: IV. Pie Jesu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199a007d7d02c83672a23101f7d0fb34126a6f99b6d4973b7c19a847de93bc69. 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/GBAKR8452004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bc6cfda230c107412117fbd7a609a06eb529a7eebadc8ca83a53cca0763809. 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/GBAKR8452001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57d34e861aa31ceeeb0bee6f318c0bd2cf90f24fc04d224f5ee61c8e047c18a. 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/GBAKR8452002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cd5a7fb26144f0adc7ecf1e326b95371cf06754186fa652a2a87a41877f777. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBAKR8452003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199a007d7d02c83672a23101f7d0fb34126a6f99b6d4973b7c19a847de93bc69. 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/GBAKR8452004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f39ca40ef4f31704f648d47d265301fa8e33060c6a18c60fc5e88b8cd47fc2. 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/GBAKR8452005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9b0ef920866213644a9966b250f308fdf39e2a7c8dcb4a1d83f7c25bc8df29. 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/GBAKR8452006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08cbc002179984fcb73d24f5f466844f605bd9d9adaa5592c17d5da85459ece. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAKR8452007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22a7ea3bebcd82da17b321b968b38d3c2bbf77540e0140104d6db0ecb71bc93. 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/GBAKR9211713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b59958ba06fb3c4612f1543b1a1e832f7d6be584eacf030af2ddbff185383b2. 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/GBAKR8610303.
King Arthur, or The British Worthy (1691) / Act 2: Come follow, follow, follow me (Philidel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47559482e53f1b3b3112f5feb19ce47374d6ddb267390e0b2f5984a72902308. 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/DEF059130315.
Morning, Evening & Communion Service in G Major, Op. 81 (Excerpts Sung in English): No. 9, Magnificat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf089d516da87fb4fd3fc9fe6e812684dbdec0fd0d389ab136a8e27335a8a9d7e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBAKR2052401.
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
5 Childhood Lyrics: II. The Owl and the Pussy-Cat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c44f0bc6def7e7238857b40df334ccc8ca1bfaf92590c6d7c14cee45e570f46. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAKR9211714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e0ea370ef8c47a938c4ac9bf41bbcce54e113917f55403b921ffa8ee808891. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAKR9211715.
5 Childhood Lyrics: IV. Matthew, Mark, Luke and John
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0529a5313cacef75576bf7673da33b2c4e2430c080777d03b5f5ed188ce2348a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAKR9211716.
5 Childhood Lyrics: V. Sing a song of sixpence
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392da1e5b4cb312b94530c06ed930a28c4969e6180d2692bdce2eab8c94e7bdc. 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/GBAKR9211717.
King Arthur, or The British Worthy (1691) / Act 4: Passacaglia - "How happy the lover" - Ritornello - "For love ev'ry creature" - "No joys are above" - "In vain are our graces" - "Then use th
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ad7c3aa71fe028cc89ca7f13e17d1ea56f9aa9324d88274f27a4ea21002961. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/DEF059130331.