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 0x8682bf370f772ff0c15ae976fb4698af0e0d09593a223ea177a41e06f28facc4. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f556a0c5-3380-4eb1-ae68-3b939a0f62df.json and https://artists.proofprofile.net/proofs/artist/f556a0c5-3380-4eb1-ae68-3b939a0f62df.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 0x22123712c5092075eabb0851964e6dff76aad503d4b832b19c35c3856ffce47c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZES72450103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ba44fc08a2b752bcb1b096f443a83d451211b3e73fb326c8ebc8796c7bbd04. 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/QZES72450104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb6f2c7fdd8d2622d2e808ed867e4f7d16aeb7d66f9199c78bf2f6dee4802e2. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZES72450105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01223d01ee27384a8b3c846255387ae4469db7940218c8ba5e964f57b6099dd6. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZES72450106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ff665aa57b4a9bb7f5db65ec78fe361be2320c6e730b6cd379da9923a01e56. 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/QZES72450108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441c2ffbed55729695a6826114caa268b8e1638339ead57237959695a6c0df65. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZES72450109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc2e88b2a24fb364e26f50f96e2649c99bf99508b4262af457d71f9adb388c2. 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/QZES72450110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffab6d315c3a98c64536806a93c759ddb7db7f396ebf67a695fb6268b1933088. 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/QZES72450111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e7c45f883f1e3b3cdf9c8c35850b9dbcf1e1a50d60c119204405d1351f9144. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZES72450112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ada0a97d8ddbb7d517023a0c1a73244b7b20f3d90169e5e6f5586e69d22065. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZES72450113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df21606dd285d9c4205162605fdc0d4f55b326340557a57e88b6a861fa0a79f. 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/QZES72450114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bc63ffaf5f805782dce2d8c80076a1b2ed2707e608fdfa50736f27f84a562f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZES72450115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8375ccee903080f47573678596c9c0a63b262dff7f9f587611943b054a4f6ca4. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZES72450116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce97a59a5e77c73b027e0239de4a4bfef0234e1d2d01d00433a284299485912a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTAY2419802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8099e85db5ecf77ccb6eae2868701c9685017ffb50ad70a895d008645fe59c7. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZTB32458128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd5f0f4750771deeec0ae660e7b8e1971b68a8954d7ec8d06c4b5f40c7530e0. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZTB92430585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbccf66e824f1e4c52b864923ad70b543130a9e90e2a58de4b134b133a3fb4ec. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZWFJ2454758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa482b8631bbfb6dcb742592c8c04abe63650f021feaa37fad90e0194bd65ad07. 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/QZWFK2423454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366e44788263d75b30622df7ef4b569311b890f35d97751a08a402c0e5c91aec. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZZ792410524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5881f007ed6abe9b72be84e59a1b12c5a90a50d0c16a2d23eea8caa37a624b5. 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/QZZ792410514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d6fc73c172345dbba5d712ab5000e3aa150afb0b167df6b68b0dff3308c932. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTAT2548958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf95ed39697ac6de148435e0b7dd8a2567aed924d297e11e263062a065f94fe4. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ792534113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0774a3697664f1b749ac661dd39df9c19003737a51cfcbbedcda12d417b77d59. 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/QZZ7Q2599246.