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 0x20459bdefb41ee07ea6cb96c2bd42d2b476ecbd9411edb840acb1bdd7e897e70. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7d16c67-916e-4f7b-af3c-0d7a6232bbc5.json and https://artists.proofprofile.net/proofs/artist/e7d16c67-916e-4f7b-af3c-0d7a6232bbc5.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 0x87e14290229a908acce6cbe1affa903d0b356afe763900c3c467ec7e454cb918. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEH742419337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9eb7a8818c71a32ce218ff9a6c2feb5e58e517ad5e62cc9d62af4d47ac52370. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEH742419341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4500dbbf55ebef3969e8e2a7f778cd2e4717b7a27488a00ac674c6b36a7c84c9. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEH742419343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba47da60a0b9a9b9af7a1e8aadfb6fd011852e148ea7ae4f23bfa93707e8dfb9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEH742419345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500e31f9406a1df0480768898884fc73188e883b7280c71d2b85c5c17e41d933. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DEH742419346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdf6200704d11abf85c90c4036831d74818bda7de898aae80ab3a3d345c45d8. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEH742419347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0947620223d76c98dd4a00950171246ee273dde878354e8f0dd43fe1e44f5a. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DEH742419349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc18463ee8aa472f64b64cf4bbf07913122c1745c3e06ff292f3c5b4e921900c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEH742419350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0349779c02d88168d0d573033496d823ff16709c7aa2edf501b7e515688e6a5. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DEPI82320424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30e4342f055a2f958a383f08d6379085e53c407a0b79a1a3a9310d2fbb9680d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEPI82320427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c81c69dd4a18c621262c2ab88e4ccee44456cf673ffd2795f1cd4a387fa1a56. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DEPI82320422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccba03dea3f9f0538444971ae7ce2fd71a6d00a63424766992bd5436a3909106. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEPI82320426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828789b6d7ac028004e5f07bf20c02e8416b304aeac2d35186b32e91b73e953d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEPI82320416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dda524edf2374937b38ad7f90fcc4f99821c53064bf118a66b062b2506f6c7b. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEPI82320414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2a7ca61a816ed8f3eb25fe859f43642c251f0a0f20ef0793cf702224261a33. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEPI82320413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5957d9c8d5063585a98e5395d68cd0c7ac299f1ae0a52399801a3ab5bbfea75. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEPI82320420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e071712a2eef8f551260db0140b55a0fee24c8248657e931703416e2c384a51. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEPI82320430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c008e300bafd2cda86f7444f320003c0e95a1257a041a82889b482a1595067. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/NLCK42238421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecab0b46695aadf9919d8af61dd8bc3d115a0e56be129bf9d5caa7172fa83611. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLCK42238422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac660444a15e2b9deb8b808993375ef420a8a171394d4cbac6b2d2de023cdeb0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLCK42238423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0317cc45ebaba136f72095b76d2cf863487df6825914c0404843d9da6929781d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NLCK42238424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673bd348d7405918dab4e4d1df54e51da420484801ef8665b061f0a45f3249d6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLCK42238425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97485817e6958640d6ace2cb553b1efd615f994312b3f3737d5fd3f1037ce5c0. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/NLCK42238427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd0c94f17a058802fd95153a2f1b6d98e8678fc84c006c654bb667c181f79f5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLCK42238428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd854ed235b3159878d25a57c2dfb344dcce6def6c8d474a32b8f211e15985363. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLCK42238432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1813aa836eaa5252604e7bdeb5385a3ec24df42b51676b6a4df1eb8f84b862. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLCK42238434.
Keep It Goin 'Till The Police Break It Down
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872baf6bf99157e4d087acdae9fc324aa01ca50af5c9c129713e63e25acb99ee. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UKXN22368003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c1099bbe2bb02646b26b530858603abd3ace9303a6f134f9c99f0e240d9562. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/UKXN22367996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8190d4576f9705aeaa52e82a04e1bfc51690db63161b99d2947210f853637d. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/UKXN22367999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857f77f79bfb5559a212e0a91751d73af4ba831e2da8a36692980df0821bfbdd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/UKXN22368004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7b910e041ff63999fa9bb25e2f546038c08ce9e79ac576eb48d2b53544ae53. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2507973.