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 0x4e8252658106908e2bd9c6a6bbd0f4a5874ae908b7d70a1a6ace43f0729cf7c5. 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/98109d01-a27d-4ebd-bcd5-7ee0219b5931.json and https://artists.proofprofile.net/proofs/artist/98109d01-a27d-4ebd-bcd5-7ee0219b5931.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 0x31efda984b700754d9909ea763355050f9de3c96f046d6b7d675663e1cbf9d49. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USCGJ2076757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5479462c873748c075286bd604d7c18727eb1f0eaa925ebc2c47bda1c7ae05a5. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USCGJ2076760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491a12c3c2f26f600965d36159e006dd59508dd025797105aac877cb9f1708ad. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USCGJ2076762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8580718221a186b909b5b8db3a67f1034f01d59e9471f995fc0d9ffccc89161. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USCGJ2076764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fc3898f968b9f73bd7b7a8f4a0624e936cc72bf256e158851a21c4658051fc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM92007156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5afcc633ae27addae2bf228ee6344519388ed68d1c4b28ed9f3e63c2e2e59c0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USHM92007159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18f63dfa62ff6130ed79a699413f744d23c58e8f0e5c9a44517af93630b4552. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USHM92007163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c219b2fdfdc2e32fb8bffac3b2fca4dce779631b3d1b18d04c931ecda5584b. 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/USL4Q1938655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf50704b81cc0c91738911d3122a8302acc7455464eb179c5e2ec080ae6322c6. 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/USL4Q1938656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cca062e0abb8183430919158f3729deb11801568c48941b4a1121f734978c07. 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/USL4Q1938658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21511762f5130b20e5387415f3d139f6db99e7f1e18cba587b252c44d64fd04. 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/USL4Q1938659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e07f92f1aaaeaa553d88bcc9eca998d129a23298e88caabb51af8c61c1a659. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/US7VG2321372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335d9696daf07a0592c12d931690f2fe06776af98b3dfe6be97d8d8cd0dc4384. 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/US7VG2321373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe782a0b94f91c7ae04b5970b2913b4d71a4f0f0a0f453e4ae13d9258c41a8855. 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/USCGH2258983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a3584053a254b76e67c006f8ef252198397321212721471d5d5ab71c2e6dbc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCGH2258985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f77562a573a49caeb2918f9489a645a9d6be2219649cc57d576ca1d94d8575. 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/USCGH2258987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b54235151aecb411ed29ec2cbb791868fd5a4f7a8888278083ea1e9384bac5. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USCGH2258988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768be478276fb9fd0be4682648a2e305ecab6577b6e2c9e2877a347893771e52. 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/USCGH2258990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de4079e00df6d364c6b53c8bf58138313d10d3efd8847000d86798321045eac. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/USCGH2258992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e50b91dc46517d5fcb88d159a1219b6527c818c0a411d2dbf8e96c87a4621c1. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/QZ5AB2311375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7726ae6be53dbad4b0716ca1f5f161536cbfa3b0fea6562e5e0f70fdbab264fb. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZ5AB2311376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647cee6ca6d68e5cf891e266200af21f0a77255bd1863bb8435391b10cb85d28. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZ5AB2311378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702988fb3f03bfe8f6e38cb95cd623f5edd19bb6108ac0a678a2c25f06b73140. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZ5AB2311379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c1d5f66d75735e8419badb9f5ae4969982f75d1b86b718cd416fcdde50e56f. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZ5AB2311381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6f41a3c13b7546eb15d48a8d863de5e9809e1763ddc0d8da1265c09ba38f35. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZ5AB2311382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b0ec15d4388e46722bca9c2e2f01f21dc874f417a36c58ba7031cfbacd189e. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QZ5AB2311383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b5afee8d5aa4c9119d13b63898f5ba1cad85ee1b7d5f67ca165b2b9b410ed8. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/QZ5AB2311384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8de0ae88cb112c415168f7db9a0709764eb07e9df6eace9ada9cce6c8b65301. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNJX2345404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ac1b2f8b2ec9e26e457641132544d1b6b9874c43fb0dcd32c606d639913a43. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/QZNJZ2329385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4646f8d62dc841ab73696de3944e331fbf98f199ae29c2029bc29e2ef108b8. 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/RUAGT2351446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a7d13f49f6eb3d5c367112c009d3b8e976de045c706a65ecad304527ae9c2f. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/RUA1D2413765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a85d2106c2f3ddf401047c695587dd32b03b5109f553edc63b8a38e7e4273a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RUA1D2413767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3022839a317c82c8e45861637d21ca89913c7f05951bb47b3d87e63f5daa93b. 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/RUA1D2413768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b2b2e548fc3c274f099ae8af9eda1e731059ad11b7e5b6d1b77fc87c0f996d. 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/RUA1D2413769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263677d4e9a8027516b689431d23432bf4a302fb01c2b7d2932b057cbfc9fec5. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/RUA1D2413770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1fb0701a37743edba62a830fb94863392a43af5b7f5c474d33d8615f12b2f9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/RUAGT2417150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d06b396a42776bc7df32c1f182368ba7e49aaa812a4425fa3115020a7943811. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/RUAGT2453320.