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 0xef3109007325e09dad0fb2f3b5311d9422e1392d2396d1147ee2b61a73e9b012. 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/91f98f6a-8a33-4c7f-a60d-29fb7c20ee68.json and https://artists.proofprofile.net/proofs/artist/91f98f6a-8a33-4c7f-a60d-29fb7c20ee68.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 0x2960913d69763f4a67468f47ba60bf485629a66897e58d4af607621ed64bb338. 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/USQGT0810205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b2e528621c91f3266ee8be0b7c291b9dfc24445af3f0a98dff92e047bbeac7. 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/USQGT0810206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485b7518be3e9272bdc12e100ae07fc44fba63f043499054ec0444f673a141fb. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/USQGT0810208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b926395f1c538f96fb7348ede93b9fb41c35bd7b4c3f9852b116d794884d58. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USQGT0810209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e40414fba9460586bd9f954e72ea607a6872d73ff33156fa9dc5b3f100ff469. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USQGT0810210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4272ee0f0224937efb5afd8aab7ca88fc570da3f965ce93d6b4f94e590b4ae5c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USQGT0810212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3792ebfbad4fc9fa72dcec8804bb3431c41f42f0ce82c5073434c1e7e2b2b46. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/USQGT1200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade623022fea8f076fee3a9d0a99545d696d80130b85743d81a201a1a78d63c3. 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/USQGT1200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2367beb78a7d6b81a929a9acc99f93fc9d4cd2c2291f24aee55cc0381c03c252. 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/USQGT1200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4bedff7c935ecd284cb6e9bd55d3ead7061cbeebf2ff56efc541c965eb2f3e. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USQGT1200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1c45c4e544f624b08fe5e386e971e6db27e9183e23f006683ad4481f35c3ab. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/USQGT1200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46987d90308559cd625541959d3fbd10dc9b26470ac2280a784f660fadec96e2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USQGT1200018.
Live At The First Annual San Francisco Son Jarocho Festival
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd5241c3804e7a9cec079332cd751449b57372ae1d216f40fc796501d542f26. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:21:37Z), 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/USQGT1100266.
Live at the 1st Annual San Francisco Son Jarocho Festival
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666f1cefee2725f7abd2b8bae031321cba19a98b9024fc385e4506c647355f24. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QMFMG1363590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11c63093502f9ab141b4759c07dcf0bca0e7cdc9279d2baa20836476222e5e2. 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/QMFMG1363591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84413172a1c8257fac9b75a3ea0ed89675d130c6e27238f46e2d9dc865e4e08c. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QMFMG1363593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5c56e3a7c704c0476f1b5d9009e0dc5d1c44edda586f5cddcbdf871805430b. 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/QMFMG1363598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd897abc0d243d4cbc12b3fed24ba9dba9385bb736be04a2e38112b80344d069. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZGLS1901594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5a19384af76401730917d52a3f04d82fedb15f0e82071eebf306469d3c49da. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZGLS1901595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd41c7a52d67d7fb21b5f6bd49f3b70354630828be0f35a31069e2af7e2bc8f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZGLS1901598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7477ecc5bac4ec7653881d24c7c14e5d74f849230821c290108e6391b4e0deff. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZGLS1901599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf1a58f70537d8bc128283f89d63fe033b4ec07bc65c4d58489664c98428427. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZGLS1901602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b304e869b153395ab7cd505b73bc3db51d2072359511d7fb58cac39a7ef9388. 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/QZNJZ2176916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869829988b03ee4e492eaa5c64055b3e1ed67dd56a1f30bb8ea5e986f567eeb0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNJX2263671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1097c4f61d2abcdabf693390fb082e4359b271bef8a4c51f6047072bdf97ee51. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNJV2326685.
El Cascabel (feat. Los Cojolited & Asdru Sierra Of Ozomatli)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91833ed4d33e337e87702f84c9e3f3e4a8d16624bff9a0a747c41b35e14bca30. 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/TCABQ1382044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a20727420822371600eb652de77cb1e724e610e83988cbddb2872b1c0f83e56. 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/TCABQ1382074.
El Buscapié (feat. Los Cojolites, Stephanie Delgado & Caña Dulce y Caña Brava)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f5a1c40f83c29008260ef7f5276e289ceaa5f9c7b2ab840acefad63a5fbb92. 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/USCGH1904512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d27e54657a45c21ab5c0b8dab0c6e33723c43504e2e28b98f3ed8f5981da19d. 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/MXF012000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa442d4e83e015aaf4c4439fd6ee03f3f5bf87ff622500746599a01a6865d0b8c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXF012000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0905330f63dd98deb0f46d9cfbe29ed86e36195232f84c351ecb1f5734711ca4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXF012000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034e6c109eddfd6c2d09660ac0ac4ecc65abec0b3c3f53d922c330ef674fa4ea. 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/MXF012000014.
Arcoiris por los Derechos de las Niñas y los Niños
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d90e03709f7c571aad938097663d506ca5e3052b5f42e1a5c7038753339903a. 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/US7VG2449611.
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