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 0xfb699687d38a910cab2e9b096510c5fbfeb6ad8070b6cc0a0d5619b6bbe3fb4f. 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/6fa22295-ca41-405e-ac40-6ea38f7baa6a.json and https://artists.proofprofile.net/proofs/artist/6fa22295-ca41-405e-ac40-6ea38f7baa6a.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 0x63caf6e3a2b5933952f18b65a95974878da30160a54da3b194121e8d28e98788. 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/BCZY52400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343d97f97798d9e80156d67af16e1d0e30ac27037cfd1d10ef53329613ce85eb. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNJW2455231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453cffd38538d951f555082a889ff52247fcc82ef44bd327f0e39918b123551f. 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/QZNJW2457216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171978857c4bdac9c591bd0694f719397ca9814da58da56a1f220e7cb10139e0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BX4IU2502093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fc5cc884d477d781ef455ddc16cbab7bc9605e22476f570c654bb8695af66f. 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/BX4IU2418849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926761f1ccd3431507d3e4c8b389774b054e26410a93d3a312d40f868fda8add. 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/BRSVB2501125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27526cf7442cd117698c792456fa3ac4b3fd43685b3d6cb7be2f32bd475b4073. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZGLM2589028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ee195560e56df3f73eb4dd0ed030cc634945e21000bddd141582b29a21b62b. 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/BKCMX2500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bbaaed2eb8777445bd131975e23d7583df9440a1babc2b22bb61a55e1ceb75. 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/BKCMX2500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abe506284f729fde881390dab99afe24efd8ec030e21ab6f060f098af33c9e6. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BC8182400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432877c18a6f6d1de7970155b8a2861105c39aa617ddeb9760821caf2d6bf90c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BX4IU2502930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1025a2bf8950026d24443411deed91b35352275a5cc391c11fbac06c6e840f37. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKCMX2500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d50dba6c1c3871e79ba781940bf23d080d66bb2cd1a8e2f53be62d1b2457ecd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLZJ2599656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82927b77b58ae770e5eb73f56427bad62386aceebf3d0eab417d57bc6d8c43ce. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZTVM2488785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e1eca00192b9caddcb6ded3c8ed9e4c75e9c736732e5c52218193d60f73196. 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/QZTVM2491176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028e7f1ddbe0625c2fecec7db7acde7efa844dcc162fb49d4876ab6d8be50983. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BX4IU2417694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cc3e2663b9d66fa3a6c145466156512b23494c34f9ae5f6e9d0f18fb8b56ee. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BX4IU2418608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dda9052a17c845e725591b5f534627cffa3e43f747b3cdf01ec5c6d34cc4584. 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/BX4IU2418152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e89bbd00650bb98aadfc5a20f36410961355e458a38c88ec806fc15094fd4e. 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/QZTPX2449021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019f706e49b53efed8280531956763968fc351c71307f931232fe61303a99ac7. 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/BC8182400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff7ddfc5c1a9addbdcedb788f652c4e2a75ed97622dc37bdde918d75ac913cf. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/BCKM42400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf753122330a76844be014f40c2fed41bc995548a349c2c9b8fefd2823a1da7. 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/QZNJZ2421536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf595f9399abb1aaf5cae971b3c0c048fb7d9811893de0212588ffcbf69549af3. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZNJZ2455606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3621d7d9e4637e5a21debf011e1f0b9c083671e1d9da8cfae1b6bea6d0ec7cff. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJY2452524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f07ea264ac695eed17fcf716408edff1c27e6370e88b67a17fd40289afaeed. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZNJX2457629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf156271f225a06bb256a556a6175ab5b746d6a6d70fdb18d39587b78b0b338d9. 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/BCNWM2400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7cbefc40f563c56719398bf7e9fd941919f8207986d26c8d6e792965f2ef39. 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/QZGLS2432406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13b22ca2f065d310127d85a9d2cc5f3a63166c16a82de41d3d92f18cc34d201. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZNJV2404993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9f3faa8029bf3bea8ede4ea96cfe11c7d9cf38d6a3511538664066995baab4. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZGLS2441599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c9a9fc252fc3f7b1bbc2e00d0eb7cfee41f896532441f038b7dfe86e9e4436. 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/QZNJW2409201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1f30ecbc076babd347e021ba281becb04d35065b019ecb7d4206253342a9c4. 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/BC8182400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa036bf7f1d0b13bf46b790473f419bcddfe217d453b50fb194481e4dc0cdd5f0. 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/BC8182300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67ee0480084cc82548d3257cd670d32422e401d48ee2b68181d5c91d253684f. 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/QZGLS2442832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea52459a0a966d096adbb92ae5213f78af796b4d625579a150db795b50944bc4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZGLM2475494.