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 0x7a2c46f69d458086d8f7f188bc59a19bfae6ae033b8c8a1f822c9d852bdbe812. 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/ec750110-e9a3-44a5-ad9d-4fe8e6e1782b.json and https://artists.proofprofile.net/proofs/artist/ec750110-e9a3-44a5-ad9d-4fe8e6e1782b.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 0xd36257becf1ec07789bca7ae5e51086d4244ac2a3a3c7bf5ffb4bee59653cad5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM2PV1798247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d71f9d70f645f5fface653de4be13b26de9c69d6d24b33841d03ddbe83a603a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZ9Y21708379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0153b8e1241c5e9cec95d0434decea2699529f39545848f928d19e6170fb6399. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZ9Y21708381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5addda52a5e0ba28642a922ea7f5650d3ee9a6f76bd4210dcf3bd5e2074c472e. 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/QZ9Y21708382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bbecf0a7a8764dfb90871eac23cd66235e70181394671d4b93c5fe541b4825. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZ9Y21708383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7dcf6d97ba57151f565a6fdf83889ff4df8e8a781d47298204fbe0a1214f38. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:02:35Z), 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/QZ9Y21791990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682e7e8a29eb5ad812ebfae6fd4916c811f228ad78bff6648081a81d5001d6ff. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZB4J1897791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff8b0334cae23e13664ccef55a49ba1753efeeabc7de1f0d80acbbf842957c7. 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/QZ8LD1975053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f30a6d4909f98d1ec6fa736d852f8d23e87a219d2c9c395290f2688ef329f1. 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/QZFZ61974004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66b696bac2edbd3f9dd11af49a9248557b16701ab19ba984801c7ba61334917. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZFZ32073481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1165549832b2604f90a5247304d25fb551b6163c4d55fa820bab667bdfae9108. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:01:29Z), 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/QZFZ62015326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe8959923b4701b9de5210c7693cbb692025c98d5fc7c024c2666298be0767e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHN42032912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ff2866ba440c129d040f43bfd4d3407975b93c03424d7341da2fcf420ebfe5. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:00:49Z), 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/QZHN82012537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae519dff36ff84acd1347963713b60ee8fee533ec722d4d5141fb1cc3c4f9f9b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZK6L2069864.
Because Why Not?! Ultra 3rd Strike Hdmix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d6882b40202bae5a3bc82a978819a2e5ad316591501be027f645ffc966bfbd. 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/QZMEQ2053133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdbd24d719528eadab6889c6bf8c4076e927caecc92347a6f3e66128359692b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:05:08Z), 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/QZMEQ2055391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672e3940e6033173aa144a63c09fcd13dc91c1c452d5774b8515bd5669045787. 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/QZMEQ2053135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb1a950c374dfcd4d88fbcf0324d563bded26db5438bce07c107d28c2d9be50. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNWV2058077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d1e34aa35f3c5d948bc59dca7d0f57ac7d6b82af5b156acf2e612e2025ae35. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:43:59Z), 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/QZNWV2058078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac4d8760e5f07520d9f77d01bc2f2f8461e829eaba0b3ae94689772b31aab94. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZNWV2058081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d604a5aff7658ee05db2f12364e43b4e78a64e9b6418404ae7f0cf723eed702. 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/QZRP42109141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4533af33dae07976f3df35e82923c75d3f683719474f86fb7ffd8975397fac2f. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:31:22Z), 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/QZRP42109142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d79e592dcf185ed3171d79f3c8ab84fe5505d5b1db54a4fb0fcad72965a3053. 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/QZRP42109143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c92527504cc0c87bdbe7a231afd3fc71fc28d9fa57df376316a903c2a499f9. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:19:25Z), 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/QZRP42109145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccc8980fe8c8b4469952fa49baaeea9e1bfc0362983e97b46ef8ea523587e1a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZRP42109147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5711eb55765bc84698fb9038ae946fd6cb496a145d56e62f3ac9a387f68046e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6G2236089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c6089d24e3799f2846c1786704444de8d1a040e33eba7d6550528962e50af1. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZHN92302218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2365c590ecd94d25853d9d93900c6c836df5f0f3d24f6f2bfa5e503becf0810. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:22:48Z), 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/QZK6H2391200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee2d17af9431d347eda1b563f59177725b1c0922df85a3135bedcedf645ad52. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWS2378385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1255e39968f1d7ff2c16959ae5ecbf12b5444836484a308aee209fce85077d32. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZTAZ2364860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b761a46783af8f6b43ae78c6205d6cd112678e321644196edfbcc0dd4f5b57. 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/QZDA72435847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022cf005d11b46cf35a5b1f517d234201f9374d3a506b1c097c3ca7eb3223ca2. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:01Z), 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/QZZ782496868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266b0262f9bc2f9b3e1d8c2c1815cdc75cfd919ba02011ad85dedc71d6440aec. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZWFM2369083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fb2acc1ca5c9b915d67a4f57108f7f29c743205ff34c1db034efc5a095ea0d. 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/QZK6N2011631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c3e24d3f4275abf33c6d6b2276cf90ae9f7e3465978418b7d34c5b729ef109. 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/TCAET2033934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d20c6966d913887043e51eb7dc055eb9cc3db40fa20639d607977498e465bf3. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZHN32013263.
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