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 0x749c07ccf1e01d2296d1231bf5560ab1d857f9da4b456f2ae29937d57836d170. 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/4dff3fb8-a33c-4b57-9d95-df057ffaea52.json and https://artists.proofprofile.net/proofs/artist/4dff3fb8-a33c-4b57-9d95-df057ffaea52.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 0xab06451bd056759765f270c36eed03786643ed889ce996ab0c698ae9a2cf6c76. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:11:42Z), 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/QZHZ62009782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc725ce1d5f2765efecd0feab8e4c056b6c8b3423d307d01663761cad5d52cae. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:31:58Z), 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/QZHZ62009786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78be1a21a933213148d2ebec049ffa12cc29f06992f4a36bc0362ae25002e526. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:30:01Z), 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/QZHZ62009789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450b5374c12fe4b61d565e659f8a70abb32209dba70a602632e1e54f43c59e34. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZHZ62009822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4d84090a795472ba1d3c2ce58b2a63d50468b61841b55266234410a4c6b15a. 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/QZHZ62009826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bb3f4196e19f3499e9f8d3c536788121cd100e8f3ead6998c76f9c0f7f6fb5. 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/QZHZ62009827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde147f8425efdb7fdc0e17888bdcbe96f56a3388fb27d789549753a256d36d42. 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/QZHZ62009830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175b2e9953d431c76df0ade458b95f35cff4650083405c4cf293c8958792da76. 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/QZHZ62044138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bf8837cfbaad68c8770f23fbfc57c432a3fe2cd0168836d72658e4dae55779. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHZ62044136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b73a3bc0adca33c62c0daad8c2d07cbabfb747a3858127b889dc2684adf139. 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/QZHZ62044141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb527f632e4b43e4cb1c9b55a0555abddff5e81369100a55cc94463d46a4dd0. 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/QZHZ62044139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe341e1cd2fe9110de78beeadd868188df88bb19a65852433ce2ceacb7f4a8e9a. 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/QZHZ62009838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c34dae781b147f4eb29ba1f4d4697ecd08b57929b2438d62c2c05a01faf1d33. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZHZ62009840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610adfa9750de2e39c883c32ad68be09989e9c93755f197325ff928d6df9099d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHZ62009844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b644cce6277d1437861406a311a02855a1a4ac30471af0f04dafb6fae96f83a. 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/QZHZ62009848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446b629d25c6e8c94fb83cf6f58d314d1f420640e85338d97b653fc3f6f0ceef. 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/QZHZ62009851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b98df6043e9ecc5941fd4ca6d87bda4bed269f853a99b80d29da53d43458df. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZHZ62009852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf628e3ef994e99fa5783c0f6502b55c604ed6edbe8331ea2114c074686868bd. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZHZ62009855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf608a25f9b20338f15a06a6e5417ac761a4c137701579efe990aa5b3028b483. 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/QZHZ62009858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6135be2d565cfa448bc62c7d5112b2acc94ad0267aa74d072ef33540e28fd71. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZHZ62009859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161919a61888fa4fdb92dc58eb5d917ad9f94e0f129498e9b6ba182b6b763481. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZHZ62009860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976b615b8e1acdf9f1b1714e6a2a85112f2a464b7d31701d4b3fb08f8cced7d0. 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/QZHZ62009878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19d0e3fa531da6cdf59d86998b0c0d999c6ccf2f5a2bd28b0326faa8ae2b712. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZHZ62009879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f392baf67c04e067bcb209853aefee1c77b7cefc5f261a6f30165da501fdb3a. 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/QZHZ62009880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fee831752cd39ca13c6ab2b69ef8ea18662ebe3fa79f7ea1fbd634f4f2072d1. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZHZ62009882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158dcfaabcd9cd97665d30b9ce5f9bc8cb2e87f525882200762e52dec52fc109. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:54:06Z), 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/QZHZ62009883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa7ecb434f90b7330cf5feaf251c9608b2474fe096d4d293749d937f7857eec. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:54:15Z), 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/QZHZ62009884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddcbc4c5964690a54989ba713739354ba5914218f13adc16dec2cdfa36f5d3d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:39:17Z), 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/QZNJW2122246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027806ba21cbc51fdcc1b4529a055d691fdec754676f9ef0c5733bd5fdd698f4. 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/QZNJW2122248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc83910474a10fd90f613c3bc5a9c62433d07f2da87585976b209d5e55dc07ad. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZNJZ2306117.