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 0xa83a98c56c5f4311d7e0f68d99f448e66a3c6b23070c8d3af52d72d7f3f28040. 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/77ec5d10-4bcb-4cab-ad2c-5dc1deb64cb4.json and https://artists.proofprofile.net/proofs/artist/77ec5d10-4bcb-4cab-ad2c-5dc1deb64cb4.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 0xb3c54e81fb25830c5e5de681d7e5b206b2c4f5a85b3da0f3ee4917d535e58973. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FR3GQ1609560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c7ac2f9019502804ae824390c5873799d76411386ef7f11ace16f01864e140. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/FR3GQ1609600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b12de25d0329cba9155053a0030d31d943bd6ca8577d0580347292d372f59b3. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR6V82399663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd442fa366c2ce69e37196ede4283bcd086cdd910e3eb2cf70525fdb0e62e3a9f. 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/FRX201510604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66be24afcfd16d7e0b7893a3d13056a3462d89c115665058dd2a9dbf6b83291c. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FRX201510606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72e7ac21248090906c4148c18d665e59ad7be609bce7553a5a22316d9ee7b2f. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/FR3GQ0900780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e5470142c96592ea7d8dfc752fc8a61537425399d33c98ef1865dddc7aa59c. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/FR6V82409708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee1f4c1b3b0f8be4d86a275cba9c304f362d17c1a3fb94db38bd8eca34ae48f. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/FRX201565037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f19e4e8ec42b72d2115aa7e0e13afff5041a6149e431649183c93a20a2cf37. 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/QZNWV2032855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418d0f60b949e23622dc7459352f6128120600ee36d5f026bc4124b97bb11ad8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWV2032859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c28cabbb20b51a8d5f09b671b1691de56afbfd238ca34f10b7c184968d27635. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZNWV2032860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df231a58226d5f6533b09d1d9df36c53dcb4286d8ca5c54e316fe9c5a3d061a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZNWV2032862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df747d0812033a7eb4fd5cd68d0011515188b44772d84c45e42d13ecc61b545. 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/QZNWV2032864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf563605f57586ccc27594b42dd43304cf3168b62362ee02fe352800870184b1. 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/QZNWV2184670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a566c7ddef0189a51863639ae7c37e6a5dad4f45b36d804fc70e76ddac1003. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZTAY2367033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b51e21a1b138f5863cfadc8d5f1bcee76153b4d008ff3428d593d233b3e7b08. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QZTB52347434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4d2e311d09701f0628be4f46e7f0010a95c65e1a010b47be05945120c0e5d5. 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/QZWFQ2306708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e1cd151e7cdca7f8717a971c777d9b68641c56ab9671e81f310023ebdbd849. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZWFV2453350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4f0356f4e008a2e38535b7cc180e0213bd230b3b9f5c48223a6408ad23900b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFV2453351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1998e79f2717853624e33c52a6128f3d75632a856e6972e463fa6f3fe9fa66b0. 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/QZWFV2453352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7973de90e68cb104c97eda430703b9f5e876a49e55f6d3989154a1584dd72767. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFV2453353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56c5d553e72cf12dd43ac5fce3c82ee6e232da4a53268fd5f59408260e962ed. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFV2453354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f016749e6d5a02f13941cc7931eef9ef70785f42853669e02b8bccdc24a087. 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/QZWFV2453355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3972f41ad787c4bc150e56a73f7a1ddadf279690ded33ba3ed61dafe1b81b5d8. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZWFV2453357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2bf9c1d5ba7eac24efeee103d44925bd72ca71d88ef8f1119be1d60c5a43b2. 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/QZZ7Q2441306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d31362ec66e107de01435d3b6fd0bbb1ccae9fe61af5daf4dcad737b82a92aa. 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/QZNWY2595392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61576cb7a9853bb971e2f1371e0ec2c62a0f823fc2fa0b29ccf5e0866a5f080f. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QT3F42523341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6028746203e1e4cf36dbcefd5e6fdd2bccc835b3561b0bfd207485399382d92b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3F42523342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89048c87c34bf72635f2d30fe1da0c0e46f147cfeb284250643473a8f45c5600. 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/FR9W12205670.