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 0xa8bff273c511cea9e34e659138765976f6035f8ac45f865d4eceee08d9ca733e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed9cf62a-8e7b-4c80-88a6-df5df75c1ae2.json and https://artists.proofprofile.net/proofs/artist/ed9cf62a-8e7b-4c80-88a6-df5df75c1ae2.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 0xdb0389859cd67ba3505efe65712360715e479874cf21ca0dc621a3fbc864f883. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZMER2446539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc849c34d892e83bf7b967dd4207166ffc716761b87480788b812c7ef7b51d0d2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZMER2446540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b116e8d682fe1a3e7f4740ad9fad7bde09d31e40428a1751fdad723671440fd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMER2446541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b54e3a345424699b3facd99a363a6f2f2adb10bed7e1188e713aa9c3644a9ff. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZMER2446542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e78e8a7271f916a7e047445e453eb810047ff1fdf135cbe3392975e5a525b4. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZMER2446543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ade7525604a5d89b2053f2163765266e472668804dc3848e68fc933b0be1b4. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZMER2446544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1967ad08a6e0c1fb7a6c4f3ad96f62dc5b752d54a41cd50b234c73f2c659e8a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZMER2446545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7114f5b1b8cea1a317822666501a785e5a28b3ad046227918cf4a21339acb24b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZMER2446546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fd634dcd3e98ad2be841c7d7ab7c9e0edbd6d18f95246496153b150c69196f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZMER2446547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cf9f67bcf5f5e63ad3325111350b504cf1d127fbda5cda704990cc180f5337. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMER2446548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc634179d169f288143fe14461495e3f48d33e98bad504f7f907eed0a949c9999. 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/QZMER2446549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e5a227025462d20135c6c57b194d02c70af3065288d316b264986ee3e93a06. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZMER2446550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b20e81a1e09000bbeaaba1738496b91b5267105ed13d2d7868181bbb46c591d. 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/QZMER2446527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ed036b7927c756a7fdcea008be39c3bf83ec97ba7e25a8706e4387d1282348. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZMER2446528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1ff3f3bb7c6ddcd4b6b87b45272f5bf0394b03f9baa873486f24f63c43c63d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZMER2446529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302655c15151893fc4a2eec41795c6a880900de99990ec2e2f13e44ea32dea75. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZMER2446530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56382c5bd3ecd3e361d5d82bac1f76dcd993cbf15605eeb0a01978888cecbc8b. 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/QZMER2446531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea76f2a63ba8508bab165262c9d26830c35af37da2b8cef32793529e7befb68f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZMER2446532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea8c2994e390f9eb2b58672898b9f27e767d5115ea03bbede459d1546144af1. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZMER2446533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cacecaa6f70662d4d445701ae3e4247460f01c1f1d6faa9ebfeddbff3cbfc3. 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/QZMER2446534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2705075859d56daf09e183ac3f5d9b4ee46a2007ae4fc14abd66559ea2867c9. 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/QZMER2446535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56249eab1c4f99bb70e1e97b26bf1d8889fb957a614ef94eba58fbdb00bca4cb. 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/QZMER2446536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f72876663c9bd6283a9f06335533dbae3bc1ed3250fe8371587b43db66fefe. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/QZMER2446537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6913ee2041cb21c7bd691ecaade4880b4e48aaebee06ce8ebbb8f0c30c3aaca3. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZMER2446538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c85ca5253e2da52181ae10c40df3246bb0baab32403c0b7b9ee868008b33fb8. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZMER2446514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1856ee7b36b556d835476256836776c4040cac778bfc2603bcabaa2c6c054448. 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/QZMER2446515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95494b8a6c77f394e4c5282ce6aa488294f6dc6b0ce971b310778ee921a0dbb. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZMER2446516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04f6592c1b2248be2e36aa216f67a276295f530565fdaa8b41ab17b5478302d. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZMER2446517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04bf7ff37e348b3390c6a7a93f8033d4f83bfe2bd8f4ab4ae6d60ba0b482a1f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZMER2446518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc110ea33391663b0afed25dde0d2c49381a2a4086346c0c347ad3e3f43b5278a. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZMER2446519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15ac6d3841da50e41dbba0ac52c51ce76a3b9d85c150cca6305d6eef719f702. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZMER2446520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ac3390c17764e98df39b32b6ec328d3710288acc377e54ee552c2003dccb30. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZMER2446521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe3b05c021facdffd2fd5594aeeaa6d127de75d013c00869a53ccc8f0da6217. 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/QZMER2446522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b25d0291a839b58e507240f53380b8ad1934f036487e5939aef8af3d128e951. 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/QZMER2446523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eae00a2604653d66ca3d418e5fe5ab7b779f5ee505fb965b62809f9fd32aec2. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZMER2446524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e5da127b590cedb1bc92d3a98df22424e13ca84784a06d9753a73a7b97d0e1. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/QZMER2446525.