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 0x16b3fd88f31d8d63bb4b6c8f6cec3c7ac2bab25a359df69ea0b165281eb9ea06. 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/faf08d66-5c70-4f0d-9e4d-cd5934179e92.json and https://artists.proofprofile.net/proofs/artist/faf08d66-5c70-4f0d-9e4d-cd5934179e92.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 0x8e9fa9db8470f4b2527ba953259b612d431af60b3e2442022dd6a1804fe54f2e. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZHN82314362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8314daa4ba0dabaca71efaf5a77f0b88313d4bf9ad755d46fe4f536df3c532. 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/QZHN92325580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2868e2ed00fcc358741806b055a749dd0df561857147599714a0e0051fa208af. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZES72315902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73213d21ad7867a0c9331dc91d9a9ddd06cc967bb265bcada035d1f7859f20c4. 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/QZTAW2324367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286b0c7f862763ebf525348dcb577bc956792630a89fb7a051175781b13ccadc. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZTB92377469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a0ac488de1367419415090bf73c267e339922cc2808f03bf2563777980bf4e. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZTB92377471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f4c9f8da7bde40ea65f96424ef56e7d7f57177b7a655e974ed779c78ef5815. 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/QZTBA2339966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4c6df81122f2fbefc0ab6f9183fa1da2a5dd10db1c7f42229a22ac9783ef8f. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZTBE2338777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca3b638f860255c5704db51f2f36e9b9df0d2260559cbfc60af09e78daeeeff. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZHN32449908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b5565730988826232701b52cdc91d5a9d629c09b292dd6330de51a3428c8f9. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZHNB2409483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116bc39463d955b401d6355b5826787421d56da42f1f98fe66d4968014de0a21. 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/QZHNB2409485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed610dd53941b3326d21602b70a6c812fc37cb15408e84a30babe490f81be663. 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/QZHN52434881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0c61f880391437bce11ba9585c2189e6c56fc055bf593043f86304b96735e4. 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/QZMEQ2416617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa752a8073f5d0dd8e51122c2f333ebcc69703fb73278f2422345a27f60b9146f. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZNWS2460536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05171a40dc869e1999244551fed889b158427575d663f96477abc436b35dc610. 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/QZTB62400965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a11159ed7f1284f6577ee589a18e0f8f46e1f9ed8445f081e085d556ffb6604. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZZ772410200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33793435261a3cef18ddf5d0f12c1769aacef1d4db7bc3c31c031e9dbe0abfd0. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZZ7L2403224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18128975a8ee5234ac7df0040eaf4f8d2634e9f74ca41798e4bd8c15e5e6b126. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZFYX2546883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdd1482718cf1d3d4c2dc439e12e53ec1447f62a8a84be564c64bcba3c50b6b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZFYX2546887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3981d6b67706626ed1fcc432a08c6c39bed7a3d968b81085ffbc3311f672aa7b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZFYX2546888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79eeb2e3c45bcfde0af981b0eb6ec301b279d68956e8ea2398a657db6f6bbbcf. 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/QZFYX2546891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d241065167500be8bc23df5ae92a3bbdb14b83b2e7687d03a1d181351f2ac9b. 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/QZFYX2546895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0162a29c6e39482df914fa98f67aeecfec03f5af24cafa844c5632a92ec22ef. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZFYX2546896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd830ae8acd784c7e675b5880ec4779aa2d873b71e054a2cb5df8dbeb0a1922ca. 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/QZES72513763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696c3c8078cfe2c16b451258b6e1d8f88d7638ca682b773131e88cec53fd3025. 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/QZHN32590591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b1312e188f5f4f4011ae2d3099dbc78019f0264af5ca1718111d3ee7c10f5d. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZK6Q2586919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002168b659c0526c216f8af960d3b151122989d6518d4c48e32e41913425b2b6. 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/QZNWX2555444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db16e41a1f2c419bd51ee0fc805ed71c74101400e28429ab54ef50829a7a692. 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/QZTAY2518521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a569c9ef075bb6d585ae387fdfd609c2b3097702eca267bf996a99508bc1c7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFG2520514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eba6bf77a4b27afbb0c58807315eb40df7878edf02b12cbc9323212469fb36b. 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/QZZ762543183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdb4218ab88c38458e276395ba314ad28f2307c0f00475ecbb9974a6b38e3e7. 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/QZZ7Q2591376.