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 0xcd7853c16d6556dc34c80546533563f3d759830f73315b13df09b88c9e116762. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e00aee6-f5a0-4a0c-90ee-186d560abe10.json and https://artists.proofprofile.net/proofs/artist/6e00aee6-f5a0-4a0c-90ee-186d560abe10.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 0x2767a2718887d899eed19c3564f43894f9c61fbd06c4836b670127c26cbf39f6. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:56:02Z), 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/QZK6L2357691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7559dcc71d9ad622c1adb7bf94a24258426cfddf021b55e3dce34d2686eb1a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6L2357687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e58b0b66007d579e307e207fdafe36f5bd1aa4bc3554e19a377dd594fd1243. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:04:47Z), 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/QZK6L2357684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e8d46cdfbd792c639f283c3b0f67dc302a26e7a0ec1e77a40e20438d657415. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6L2357689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958576d7b6bd0f82ff4a39dab7f21f68ce2b51e3fd31fd4af68751962848589d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZK6J2318090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f18ae0e4181cee0e2729abfcdde20cf6e9918019122b2847c490d622621ab18. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:23:44Z), 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/QZK6H2325781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe2f05cd04aba66bd34564fd31bdf69b320bbd9ca37aeed952c301d3ca9dd7e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZTAU2446776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346e680661c1fae63c844b5c47f44c33e711a370dcdebeae00071dd0a881dfa6. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZWFK2409495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e6c4b1520d04a412d03572919bb4515474b931a3beb0f1b5f7d751467c6291. 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/QT3EZ2412018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe2f05cd04aba66bd34564fd31bdf69b320bbd9ca37aeed952c301d3ca9dd7e. 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/QZTAU2446776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346e680661c1fae63c844b5c47f44c33e711a370dcdebeae00071dd0a881dfa6. 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/QZWFK2409495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527b4b23800cefdf617302c5dd8eb353a7d99344e3e15013680628d26cb20cf7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWW2562359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4c2210209e1544b48e20a1026fa874a00fcf1672e98d6fd53d1ecc124549b1. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZWFH2420168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910b5011406261658315776c54f8641f705c2eee1b2413de244e69736e8d693c. 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/QZWFU2441146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab9cf6538f855b3fe36c9ea5bbcd033293a56c4b2dac0d266a0f1e30f5948fb. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:33:30Z), 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/QZZ7P2408670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3e1537d6b4464725af98ddce6a50f2156bbdeb58ddc7f0738965e6633bbbf0. 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/US2BB1201087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf152a06488054c4c5866b1bf468bf20414b049a1af952e6d3c2d7cc6f5a659. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US2BB1201088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657e0fecec1926620fe1555bae295dfa96659e6622e3eee2a2d03e4d291b9e2b. 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/US2BB1201091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e4b81ff50b4d41c8d8962a2b51cd5af4808801df081a6ebc2478184f4d351a. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/US2BB1201085.
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 0x3d6b0d089997b5e4ffa1f741a4f7a39f42451b7b6b1c262c22700bbfee422eb4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:46:41Z), 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/US2BB1201089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb860037cb9815fff85f7ccd5e6b00bf9bbd4f5086459f86ffaae720a5d66cf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US2BB1201086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a6b42df39cbdf1104d49bfd3d5bab7c5299c80d068200a68cc2e5d3f90d4ad. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/US2BB1201090.