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 0xd37e39be097de89e245889d4edec32d153cf1d50e08485d73adf5399659cd96b. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/722c977c-336f-4e65-878d-572fec022563.json and https://artists.proofprofile.net/proofs/artist/722c977c-336f-4e65-878d-572fec022563.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Composer's Collection: Michael Daugherty
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 0x2f2a147d55ffa84542ff0a533b3d65e7760aabcbd821d279facee6c3c6a1e2b8. 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/US7851600046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422641a4d46c886378d433e6da88e412afd16d84df36f2e41cef5219fbb06995. 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/US7851700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b75c99d2b8c31772b4f8c48723084d1bd623a2c0e41907088f1c2debe90725. 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/US7851700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564914be8eac410691e79a14a1df79dcc6980cfcc0ba239b9fecc3fcb855c4ab. 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/US7851700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea57b49c66d60a85fe8c97ca041974c419840863ea5531f0d0a055de7d27a42. 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/US7851700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c70276937b2445723ba9eadac8613f1e1e0154d883734322f7004a18fda734f. 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/US7851700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7a30ff2a0f49a657eb062dd3649e18d512cd2e690cf87939277e965c772dbd. 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/US7851700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38280b2cee3fbb9bc921fbdbe918b458272a6a85b2e152ee57d4b14b4208a962. 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/US7851700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a40b0e19b276767603a990e6e4bf53e7a412897246015beb17ee99e8db9f8a. 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/US7851700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0faf1f14035f598e83399448928994d3e71bf3b35786b37d4f1a564e98226d93. 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/US7851700014.
Kingfishers Catch Fire: I. Following falls and falls of rain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bebab63b9942cb5db672f7de1d5576396675852d7e2d4209f422b57df46fee. 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/US7851700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ff634d0bcde12b8bc94dd0c316a21d11fe49f6dda23c5295833daf4f25dbd7. 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/US7851700015.
Kingfishers Catch Fire: II. Kingfishers catch fire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee769c8880775c1548bc5b966899c849524972d06e1744b27a04636d586d6990. 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/US7851700007.
Wine-Dark Sea: II. Immortal thread, so weak
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabab3066732b817cf7780cabfbe715fdf0eb2752ed60448ac7ed25977254748. 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/US7851700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324a3d991354526cf7604428ea51c794d160834bf2254427950750689f66155b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US7851700008.
Wine-Dark Sea: III. The attentions of souls
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5377f75280d1b94dfc189aa77da6fa96e22c4af17829099e7796e4bee2de7a. 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/US7851700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f150a2458ffe1e800db1053826ae4f88bcdb8ab9405299ad3a4757ee396e17. 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/US7851700009.
2015 WASBE San Jose, USA: Showa Wind Symphony (Live)
1st Suite in E-Flat Major, Op. 28 No. 1, H. 105: II. Intermezzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c063edff6f3573b1b2b892992daa6de5357c8030518203b73222c31c9988cc. 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/JPG600914009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839460791c6a7a103495beacf0a4f5272ad1a679369461c66e7233c4e519f071. 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/JPG600914015.
1st Suite in E-Flat Major, Op. 28 No. 1, H. 105: III. March
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e743e2691e91044362cf6d73e5e3b8322e916a9f4e5b7861c91fe783cd503f. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/JPG600914010.
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 0x17b2459c45888756f31a5a7ea822e2aa479828dca782b1abf69d44fef8ea287f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPG600609410.
Fantasy on a Japanese Folk Song (Live) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05bffe0b0beb3478cc7cc39b9788780777f3cdb407b8c9d4e6a0b5529fb40fe. 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/JPG600507808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e959d3a28eb420c20817822238fd22a97bc0bb77047751238de9db25768af45. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/JPG600507810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c6165f0bf66a2c814c0186d4d940f14c94f42ce7a3b19e71b800d6960eea6a. 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/JPG600304113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c462daed8779764e9ef42f9298e8297e86d300d90db101cfeb4471c6b84e13e. 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/JPG600304912.
The Warriors Music to an Imaginary Ballet
Composer's Collection: Frank Ticheli, Vol. 2
4 Shaker Songs "Simple Gifts": No. 1, In Yonder Valley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb839e3b33c116cecb4a7e3f608983386b24afe008aa0ae6d52564c11726c9dd4. 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/US7851900213.
4 Shaker Songs "Simple Gifts": No. 2, Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de3bc6dddbf1c74836fb95592a6533d244165776d28f2b30e8da2249ddda7ac. 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/US7851900214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a306522c6937b9c596ba1fda937bcdfc16e17b72cb5a39e31312d5f0f55c02. 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/US7851900220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b83c4cf0bb902c5884a4ffc4b7fff328671d4c96be0508db52d33d5a39557a. 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/US7851900217.
Acadiana: II. Meditations on a Cajun Ballad
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb8368c60b5db869cb6ace5e14b40a4951193428eb60fd5056f4cde585496a0. 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/US7851900174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607b8a6ec875a9c2a121ee4a857ab0e989b989f43d93b86275996909cf44be2a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7851900173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2761c169f8e02103d297e9e9c94b875e5071ab1fa77d73474aadbbf064da46. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/US7851900175.