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 0xad209e6b74839bd90566d119b5f2dbd110db54a874144c82344f1f6f23b648cd. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15dc051b-0568-4a24-b479-aeee41d0b8c7.json and https://artists.proofprofile.net/proofs/artist/15dc051b-0568-4a24-b479-aeee41d0b8c7.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 0x3ea168a409dddecca67bba7ca9fa9de7bf990fb414fd50a6f98d051908829965. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZFZ42217868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742ad21561ffc1cfd88730e341c700ef65dcb96645e3562cc5cb6d81a3cf7ce2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN92413910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e6d73bd43e0393aabbf375cde1f104920569d2c76be4ab4e7ad2d6da30db82. 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/QZMEM2470531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2235241cae92c8ec3601d875b1e1a87af67dfe00114fd64fcef80775d7565108. 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/QZNWT2419347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1b1e33e1f6ba2446517e396e0c509bb48c83dbbf1c394371ecd7edf4370ce1. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZRP42403221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c0b4e98e8d130122b702dc009c22d2467766196fe7ae028edf32230ba33196. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:59:21Z), 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/QZTB52455651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7043c27620a2246ddf4fbb2c8893245fb96f82852a244321bb6fcb6f8cf12d93. 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/QMDA62455336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39db2effc2eae1268cd6ad232acecf87a72b5707d08c0bbdeb95e5f2711efc71. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:19:04Z), 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/QMBZ92441684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34eda7ad126d753a19a52ccde54f07d1603a9edab8a12bffd1f19380c1133fca. 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/QMBZ92441685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9e4656e20d2588c5d3649bc002cca962754b3f2be270fd862af9c51838d2aa. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QMBZ92441686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa1d819f5d60c650b888b2bc4f9dff5b472bbd2f46e828153a29f9587637853. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QMBZ92441687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471bbb8767f9a833158462e11fe9190044d359b4d73fc74253381ce1f3737558. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QMBZ92441688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33a828a450a16a18666e720226b0e209d0683eeb7c3c43f6fe5dcec1e277aec. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QM4TW2508758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5474bf04e90f10cced5e28fc8c8960218f5813af08d86edc1d8eb7ca2a4d64ea. 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/QM4TW2508728.