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 0x2cb870fab86a51058e65c5c09b8b5bef574ada36d28648ecea70dd5bf4b6ec3b. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4adb777c-c8f3-4f9b-b876-9dda6d38a3b1.json and https://artists.proofprofile.net/proofs/artist/4adb777c-c8f3-4f9b-b876-9dda6d38a3b1.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 0x46d8b66ed7db524cf60664bc2e1558a7ee0309a0bb47af877dabf251bfa5939b. 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/QZTBC2325856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1590b3dae46723550324d22cc67c66da17b06172643f9885dfdfa1f80c1c9c4c. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:13:19Z), 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/QZDA82002576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff562c054d39925f31aa09c45d22fdfb25a21be3f2cb59329d9a3657fcbdfecb. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:57:05Z), 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/QZTBC2360411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac1f123c9442ae8984e903a66db450b1b414956fd3fa2fe54ffeb5322862fde. 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/TCAJE2510157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4365a4774629345515f9d5454be6212127a0f6073dbf616b1c2d8e0d05bf0f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAJE2510191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48044d20f6b157606af64b8e38e3131256bfd70ce763b068d5c141221aa4c318. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/TCAJE2510218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72b651d33d394832cb078d2cd412f861f0d8491f3b647d6c12a89973235b3de. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJF2563326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cf1e92f94571087a202bb292e4ea1a07a9cf2388e65a4810f578f5b94bf629. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAJF2563331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeabd0097c7e5d0943c2643c1feac3e1a15f8796cebd3250d4619010bfa5a3dc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:01:33Z), 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/TCAJF2563338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0534f09a3fd1a3920ae46ba3d868f51f520b2a2e64f3f7bd5d323c280c3303e. 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/TCAJF2563343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a997ede93f2d8a78aa2b21b0a4dbbb2c5808fc3a1bbdaaa1b012d1cdbd3237. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:33:32Z), 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/TCAJF2563349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914a0995821ee489973d5bdfdd2f9d7b46bd85ee51169ce93d771c49cdae8f74. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAJF2563362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd713034392a2dc6546773079cab73afe36457e8c8c8470984633dc054240f546. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:55:32Z), 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/TCAJF2563382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c58fc2d32dd6347b5b83fd2b4779193aed4c1f79553113f2b4ddfa401dd519f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAJF2563392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7f8af980880abc4eb1596c8ee9c7f5d282efd6151236ef8ed2a6a623efc270. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAJF2563411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f4744fff19f730e25557d6fd57df7f5bc0589d312fdf02491cde4f11a88d60. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTB92526071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114e4a2b0e5451234b1dcf53556fc77312cdfcf810e2901a5a4dd8935449fc78. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTB92526046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0071b462974c1aa54f716c41a4b03c13254f66a095db0d34f5134b9f23ce08c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:17:15Z), 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/QZTB92514496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389090a9dd95a04f540c11db9940256b68ab347491f8acb8998aef048761ceb6. 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/QZNWS2403232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7528361dbadd587e10f1410883e1a14b73a0b6b06d4960d1a8c22a98650880b0. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTB92505385.