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 0x7bd284e599df77ae4d86438fbcf3b319ee03e2e39fcd058b8a8b986519571a2a. 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/710c5c3b-bd79-427b-8c6a-a5da7bbb928b.json and https://artists.proofprofile.net/proofs/artist/710c5c3b-bd79-427b-8c6a-a5da7bbb928b.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 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 0xbf3e692f8790ca8df16d52b50269e91f1112080a793888b3d49c25dce5743c19. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ARC571902328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3890b01d9324a8290b3df01bd8657a37de081b6e029cae19dbf7760447ecb861. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/ARC571902973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d4ee497eb35e03ade836ba9e3c8403a8dd4c3207fbd5ba26a2485286f002e9. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ARC572001846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d0072336cc900130cb8c26f8a2db5818c9ed7a85292aa8804f2d346fc9886d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARC572003388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8672c3f767e3b4b53ea3c3ffb25e9beeeef393390418c321399e9be59786cb5. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZFYZ2248738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1a31c4dde66cd7cfc8c879a3d980ba27a1c2a0478f1b3af52681ea8b0f1ad4. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZFZ42236619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73286393769222e6ee81ddb3fe66ffb0e6d6415737f75adca47b2275b78f7390. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZES72295813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7822d45ce0eda298e66c41dbca34f34d7b297683c6b63cc17edc2d2d2dee0d80. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZK6L2226600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38980f9787a62f138fb98ac4abc613f99c17b6ece63d5d519ba36458f2ff812c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHN52364014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750a4c3bf26ec057c4a2bcc28c937fdb71e787b7727e512f19c3420d2fe33bc7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN92304766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34767aac74d951eca56ee4cbc142ae4de3c0e4379b5aacd56b914f7e213db8be. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEQ2359873.
Sobrio, A prueba de fuego (Festival del Olimar 2023)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273372e81c4641a6ddc22116bf7f97cae2bac0472c00853a6ae95810a51261d3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CAENV2314489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ec05a4712ff324303ce5fbdd2a8661b652769d62f5a5309a0a0efd60763ee0. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QZTAX2320718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105164d8f9d394c75722128a233c43c0794b5a935febf14a30aeaa8513023279. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZWFM2376257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502cae3d148a2d0544b24a6d6672ae2ac695d434dfbeaaa565120cc645bfda48. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/QZDA72496931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db227c06d17de00a70a2168187f72c684c1d8826df566886d8780ba4fcd6124. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEM2405497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42aee41cf04e22f3d34073c1add67beff821b86412b540d83a8a20eb47f08aa. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZNWS2441945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a589310e5ef6e1ddbcd2cf3ed429201413e151f8fc48b78a4b004085d0f9347. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/GBMA22351423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9ccc382648f876ccefe97ff0b6d358d45b395ca69cc3e53d1622807d275b0e. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/GBMA22393988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4388df840ff02226d3c99c41e4234a35b0f73f2f1264d61f6345eec10b83eb23. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFL2412422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f07e6e62fa6c25b8812c80b2850b6b0109518cb982c8ff47165c151cb985ba4. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/GX53U2418972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c298de38095fafaf7f885c0738063f9c30f0bd45677f21630ed213fdfe32675. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GBMA22533503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3996739fee0fda5185bdb1f3dc9e664881fff9616c712b95005de655b90e22. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/GXH2J2504039.
Tan Natural (Session Directo al Corazón)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bdb5b1d988fc29f62ad98715051ea43cbdb95913e8309ccf11ccb311d8d47f. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/UY01R2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc9106d4ebfc98341413f7672e0577335312876dc524aeacc3739b1c1b606c9. 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/UYM123002001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e5c6bf3635ca6935632305e15549b7ea67c363c0befff8588497d639f6f58d. 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/ARC572004361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bce58b505a293806b554d4d62fcc95fec1bb27bf3ee608ffa724365ff28314f. 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/UYM121806237.