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 0x4117e5c2ffcb8135e99bceaf4295e043186cc1567a7341c26491ea5d2908e1b9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d2364c5-63ff-4e1c-9fa5-5db3569e9c53.json and https://artists.proofprofile.net/proofs/artist/6d2364c5-63ff-4e1c-9fa5-5db3569e9c53.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bella Domna: The Medieval Woman – Lover, Poet, Patroness & Saint
Cantigas de amigo: I. Ondas do mar de vigo
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 0x41e0a1ba851f45e08bf75239a02802052635b96f0e3cfa87967f3bbcb6734fca. 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/GBAJY8828301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0ee7d1500f2dc1cd9ea51bde0ac7339c0dfb8ae67877e665eee323aeab6448. 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/GBAJY8828314.
Cantigas de amigo: II. Mandad' ei comigo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dac415e3ae2d98f22a856b860453b13dad95b5e2fc4a27be957f193dc65eea0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY8828302.
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
Cantigas de amigo: III. Mia jrmana fremosa, treides comigo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da448d6c5210be92f486a7f3e149ad4addeb53ab2a178c2c2d6081b7da8431a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBAJY8828303.
Cantigas de amigo: V. Quantas sabedes amar amigo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77bfba5e3483ddf1252aa0479ec0516d1b6add6eb4a0e2da209d1cb4a8f079d. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/GBAJY8828305.
Cantigas de amigo: VI. Eno sagrado en vigo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f3b965180196926ed83ff77b77d2e1569f9ac2688ecb7c3c060add3938ec79. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBAJY8828306.
Cantigas de amigo: VII. Aj ondas que eu vin veer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe708ce1cca8e7e47a2a99ed334ccc1a2fd815a53550ad8dc7f7a8ebd4297ae8f. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBAJY8828307.
The Courts of Love: Music from the Time of Eleanor of Aquitaine
The Sweet Look and the Loving Manner: Music of Medieval Provence
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3647bfb036051d7310a50f93205607acb637d97d4c57a1e8ad37b3949bb9d09e. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:34:15Z), 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/GBUM71205702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d54f138cebd443c160df8f4321d268c814f29e2343465b63c68eb35b86698d3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBUM71205707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6086653109e332278d38995f1bcc42646b4c0d9cd1f080d855b0c1a39056b1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBUM71205721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7349f4ed6d0412b23d9c1275da5980e18b3c93a74c15263ce2c3a3ee2cbdf8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBUM71205711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd984b1f498c190f0613a15293f19c6de7dbd805a9ffc379f717ad0d5ce7641. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBUM71205704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb05194ab9328603d3b00ecd46a3f716763a1fcbe47dad01e28bf94cad698947. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBUM71205710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8041649104fcd3ab17b22d051a2e32a7ecb1aca31d471b7ee66c3a89e5491c6e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBUM71205706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac16f6b519a5219fb61a0e817be0f4690619fdfec97efe3cf047bafd593697c5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBUM71205717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d9f555827d52e1a0bd80d4433afb3d065a1bcae2a78a259a3e182039a7c9ee. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:12:08Z), 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/GBUM71205703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce8ec0e0ce691cb63ecaa2e10c9a095152ec5b19ed83b2fbd00fc9b3058e46d. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/GBUM71205708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c376c759dc2921c267ed8c94c8b97382b7621ca1ac8aa660d475ccb8e633320. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/GBUM71205718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0200124f008fabc8da947266266aed8904bf98446b436c16d51400cee3f42394. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:22Z), 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/GBUM71205716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5ee3ab8ae1b575f3c8c903bae337456ec9ec68c0207d0b284f40b69654ebb2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBUM71205719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0d397bc476d902ff14a69d1b4c8749721b5a49a2961bce42b59da7ce01f9a2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBUM71205714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01991fdc7e770c042890bcc106b2b189c6437267a6f628ff8957ac3aa456886a. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/GBUM71205709.
O Frondens Virga Alio Modo (Ed. Wishart)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458e025b5d8946acdf7e32afcf464c517969002ccdaece10cf9faf7e87e71b30. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:54:08Z), 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/GBUM71205715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66ea0738a11b9fe7bfe67cebfb233b63ee77a1056c5935274afcab8397c0eda. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBUM71205713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58a7ab2c5d3ab5604f20a8bbde092507d27a1d61953133cfd7cd095d3420882. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBUM71205722.