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 0xc8372fe95ed631d938e940d4d66978119d06ac31bede4978e595679854bed164. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e01c4400-095b-47e9-a050-2fa16b9a13ff.json and https://artists.proofprofile.net/proofs/artist/e01c4400-095b-47e9-a050-2fa16b9a13ff.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 0x2fa8724fa9f5e9812ad6654bd0c147798a5a119c332b729f19443a964d7e75c0. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:39:41Z), 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/QM4DW1774901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce99b7a5e73ce2ba8f42006d7debc654f144570da64778c875682e087e7f8a5. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:31:17Z), 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/QZCE61875748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea474464d337af1c95ff470494e2192933af64bf63f88474be2f3ebf13b09b1. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZCE61875749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d618ec5ad540df1d9b775ec6614d9029518f02db52be5860d3a8ca2f5d10f6c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZCE61875753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8297913fb748e5d2cf89782c95b962b41f2c898557d0563a1a601600250c3a. 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/QMPKX1830283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0e790050ad545a6527320ca2f21a6eff5ef6b912d55b474ff8311806db8ad9. 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/QZK6P1970996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3c3271612a5bea6f9d0818a53cce9e59ff806e9151505904dadd6ff0e79b94. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZK6P1971000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140fca03677d3303f988c4c3d456f253cf645a164189ff3be15813104b1b0c4c. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZDA62061373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2d7924b0b00c9000b6a61a1a70beff3947232642c05e76baf5505907c8888e. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZNWV2031450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9e278ab76e30f69948f94ac0f71ebff541bc58b727ed9e71c0bb2a98b37c71. 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/QZNWV2031453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc55497b0aaa46a31e1995eae4d4c9a5de3b45d56d5554937412d6ff8b96b1c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZFYY2300794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ad30106c77c0961e3cc14fce55e7aecb9098b214cd58cf7ed5d5f1fb34a956. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWDD2442275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c2e37b30f14035f1de4ea0898244d275bbbedf6f0e9b0f1b923644ded0a1cd. 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/QZWDE2412763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb148752961c1961025e1b2ba705ea2db0c217999778f2c32f2ac3a509640b4dd. 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/GBRKQ2572629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3b2df3be41572dc1a7f8ac36026cfc025618cd5c40973a07de7ddc00baf821. 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/GBWUL2547414.