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 0x07ba318be86d343e63295283ef75a390f757388e45aad8fc97579273f029f170. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5e637e4-c128-4207-8398-7d1d23e7b6a3.json and https://artists.proofprofile.net/proofs/artist/f5e637e4-c128-4207-8398-7d1d23e7b6a3.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 0x8368349ab01fb3bc06ec9270ce1a3aa72dc5ad3c3b68ad153263259cbb360700. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPB602162074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf87faf7e66f7deb3c35bbb874428f5d6f0753934de586fc52d5d7167e30bc17. 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/JPB602166825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c972d51c4dac998c36f1d575c314dbbc2c77c7363ab2f6fed3b6b518ea1af6. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/JPB602180206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f5649f48482c60985055f192cd7b1ffc71e4e919db73907190ec49a04e452e. 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/JPB602182876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6ed997abc16367e1bc1188e2af28da81a16a0c65d62b19fef56a41fe2f12ae. 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/JPB602193495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c418f721736ec817d71a1161dbabad90594f953e5cbc9dec130547f4df16c20. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/JP92N2261313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c6eafb2ed28bccb67f68f76d64aa1f838b6f3193078def91022fec14d306af. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/JP92N2321548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3290d021a2149371522a59bfe89a5b5e922abdf571101411d39b691dec976203. 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/JP92N2355259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20191c9e316edfab4c50555b03e926a2a894bd592f358f64b4e5c3f8b8f396b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JP92N2355260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89e96bb771b930b2dbe0a7f69dd0f34ef7e218788fa60f460517ccf8a556690. 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/JP92N2355261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91515927a940f14af6441fccddf7bd1ead8f525fcc157d3cb56f13aed02d516f. 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/JP92N2355262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410f57f5566d05f286bf80ccb17e3b678a683b7a27d7959109b3d9ddea8f8f56. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/JP92N2355263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e4247e2b12bd963202362d23fd48b5e8272029b96d9c56c3524de0103216ef. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/JP92N2355264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cce4ba0db76b14eb3bb283ef9d5af79c3c94f0165d274a941c96d00609e7f43. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/JP92N2355266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a010a364f8fff9a39d03739785fcedd35ccec1ac8ccf5dfb68b29ad922fbdd. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/JP92N2201573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0449072c866fffdde998bcfc7808d6cc87d35cbba6b7409d99e7896021d20301. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/JP92N2263847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54286216dccd21b4d65741e42428bfabcbe08cbc46f8cde77080c0411c5e0ab. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/JPB602175339.