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 0xb842bb67611ac77ad02d1db18e4d82abe7f63458e8f95a2c1e3caa8ea5f00c44. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b8d4007-6a93-4caf-8601-50157a12ccc8.json and https://artists.proofprofile.net/proofs/artist/9b8d4007-6a93-4caf-8601-50157a12ccc8.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 0xc0120914484f1cf124c5fdababbf5816fb349b689fad952677db5a050fd069ef. 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/QZES62595003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c6c973538d2a99ab060560084a44e753d5c9f2531348c6aec335db5c06dbfb. 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/QZES62596384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdec6ceed955ce4b40f5c2c6940824afc251cffa406c9b46969acbd7991b00a. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:42:56Z), 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/QZES72511796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98afc1676603e355f9e2d132c7f9ab11b2de5c385f76ec460714f8fe177331a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZES92542098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ac37dc90bc7becd0a5faf7ebd6950162fba5e30c9658888fb353413aedcf40. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:14:14Z), 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/QZWFR2525878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2069dd3061ced1513842b6a5249bcb541ad81bfddeaece06fe7e683522f5d59. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFR2525879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfa0e06abebc0f3600836a48ddd78a35848bc8d18d730b6c28406d6e7d9e0be. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZWFR2525880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e942c3b51c06dea0455f2a9875f2f544c0e39e0e01840ee0e120e63f55c5ed1. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:03:40Z), 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/QZWFR2525881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33197c5989341426d0e43dc49128e7ab7966c9d951483056016dc1ed7369805a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFR2525882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff98dcb29ede2eef51c6463d938fd39d5d9787c07c71546f2a88ad2d6f2637fa. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:52:51Z), 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/QZWFR2525883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94151769b738154dc46924857d2dde6fa3f9347d793c053a7c4a26fd5ee8a048. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFR2525884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe864410473573f0c2494a5d6a9eaa6af61a0f0e1c7c6a11770ec972df71e6971. 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/QZWFR2525886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ff369864677a18eba16a7840f1566e509dc13afc6edaaaf5c4911f47a64ffd. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:10:34Z), 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/QZWFR2525887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b09955d1208fdcce3dafa3b499c95e53cd8da209f482fabe36759b02bb1338. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:04:15Z), 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/QZWFR2566865.