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 0xb2dc0b72e060a4bf7307206cb17782aa2560fa0c682c2d5bc7aaca33e598780b. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8feb3b8-d52b-4d21-a0cd-3f7a4bd48186.json and https://artists.proofprofile.net/proofs/artist/c8feb3b8-d52b-4d21-a0cd-3f7a4bd48186.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 0x66f167426446252324fcd205cec5cb04f787cd6d8b73c83950874cdf2303cbae. 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/QZS662208274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1167a900ec228f46356a18e807fc055df2dce03ece8308488ac41b615d740f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMHL2255985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97e38c99936335171aae96b919d8e313042c41f4708aaaa5f253021719ecd42. 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/QZKDK2241860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a58abd61db01a2078cc2a2492e420d79783c0a57ce4127fef69450cd7018878. 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/QZMHM2269607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd604fabc2d75284b5088a0854243b188c0164f1a61ac0c7b3cf538d3fff913b2. 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/QZS662271399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9702c4423f19a1c13b9cf02c061d63e8148a8887fd51a1d71bee701c4e548044. 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/QZS672264146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d3b088802cb511c5cd25f2beb79bce448ca4a4d43c95fa45300a5f1257e9a1. 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/QM42K2215979.
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 0x7bca3bdea6d11ea952d257dfe48b510a559f0982c5a07d6c6f5551fe2ca9c61b. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZS652248526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28562c1ec9638d0325ef0d4e64549cbd70cbb5910aad5ad011361224d649bbea. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZS672228917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd43e6dd4a883bc81655d4534c0392dab23c5f4f7c8a24ab94da78024fa8fd3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZS642253322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c19fbd73e34bf94ee4fc463b85c0de662e3cf93cd1b1b7569cd43edbc8cc88f. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZS672272974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b79bf55e96e9fb08a302d4e28975251d21fd2849c1a2c113e16b31ce9a17d2. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QM42K2284071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1f00af14b2b0ff325d146dfdece89cc03e83acf59c178d4c7cc98e55fab6b8. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZS662290320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912dacea8d800f6a758df13d3b64822edf775b5ac2b68da972d8bd7df94902ad. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZS662280457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea1ce0a3873e41bc3dee172dd6b6a968f0581d22a3d79f12fb0ca777504fbe1. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZS672238609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb03f3f302796fe67d504b4a2f388b8a1f8e589c41fc698a5b5dd33eab68d947. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZMHL2207123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d1770980c37685d36b715e083ee66ef4406a207a77a92b739f690c87af65b8. 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/QZS652250501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b8a3f4f71eb2b2ff066bd59704e3634c082aa8932d4cc42f445c3df763528f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM42K1995151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771165adf7e98bee7918b9c6cc6f4fcb2901df964aa812c521c302c1d8563cca. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM42K1912446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e07101893856c3812dfd904604fb3e4c915e684b2d34988e3c7cce5764ccede. 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/QM42K1873333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc907054d71575bf78720122f8382e24745a8068d223b2ef6ab9e5770cdb5d8e8. 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/QM42K1844779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cda5754b308c2a3a61b53f609251a75ba657b931f125aa306a7fff3450cd6ae. 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/QM42K1871554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41296708665535e0823bc2686c37a472b8606d23a4b50cd1190dcddd48618897. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM42K1839329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db90f282677452915b1bfad71f6338a0726bd2074a664eb35c8e782094ccfd7. 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/QM42K1834012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624b677bc9d0e6c63c24b69a0e836eeca6579087af38ba44ca6a8b95d479c498. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM42K1897287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429357d7254c198e62f1a6bfba6cba0ac1698e3c46e9933aa3171a9928f90f57. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM42K1889216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b66ca6cf2c79251176c6028e28f33976a39d5212e5c3f32bf2000e596e19f3. 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/QM42K1850018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06cb1ef6236ec7936f2a4034c5ef70fcc1666cafe1277575922e1d29c0e5bcd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/AUMEV2461349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a05590f88d8ece271a54c2008e1493e70ce34ac5948ea75baf1882b6012a809. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE6A91804835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56822f288ee3bf260f4473cc7c8945c1b858a8aca04d680fc394755fffb1380. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ4JJ1834641.