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 0xf96813cccd0bad42899a443179d1c106d9bb88d10d4d0d3254b3ee2872b47248. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0dd75e84-a7d2-417b-9c03-37a208f5d9aa.json and https://artists.proofprofile.net/proofs/artist/0dd75e84-a7d2-417b-9c03-37a208f5d9aa.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 0x716eec0a39a1caf5a4defb381037f8f53c1ac41b7fed06421db212e3ded891dd. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZHN52052918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558a8bb1aa47763a6865b9ca1ae7d3cc83362bee2dbc4d2675230ceae6817e3b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USANG2113782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d5762fecb8d7979a53c67db3174792be517790e0ada0fdbf96594df87a2403. 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/TCAFK2196041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce35ced2e2e3cc846028d341aa627b639600aefdd8743dd72d2156a6eeb0b72. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAFM2150700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfba6dbd75c11cda0f3857d84fe751de1e0e24f89a4572c3f470d9666216fa1. 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/QZMZ92218485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2cefbac35ec4248aeb05628615d01958f6c70fc99c0df0787742d9cf51dece. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZPLR2193724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09587de132a0951f68c30132dba53e62d29d660afda6c5964b2ae9b9679962b3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZW9K2273135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20538de905456073cd70889f6a56871eab9a670a193cc79048082be68e05fee8. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZGLM2321056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca30fd7e4d893f224689e9691b53ac45ffcfa77cbf5773878846785059da9d18. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNJV2362094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8cc6fd075773c421f41bda77eef3eb8cf5bea47d9207aaf5ab6e1922b95fc0. 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/QZNJV2413792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c33b5570010511a6e215ca24b683e8349387095d4074b758e73a24e73dacb01. 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/QZNJX2430702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd6b52bc9d2e38cc56a0cb79d345b0e23858e2e70fcc324c8ec555f7ce6ada6. 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/DGA0R2472879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaac770f3c3e1c66173b0a155fc905d08b382cd576c604ffed3be0a6f0f6941e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR10S2552969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb69b06a78b22d41b4f2e5532ebb2df7a904ba2df56b73efb7cd6307a05961b. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/FRX762523696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77c4abf0f1660e6385ea30540ee23c35808545c9dc33b3242ecde3da4284334. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZS7J2517471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa211001e07cf960dbf3f5776d5c19a52b6d137eb7a45949cf04e441a9c6a0bd5. 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/GX3HH2142551.