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 0x18396d2eda4b671f37bfcd3d39a8f31cc76c86c04fd40cbf525581fef4c5c80a. 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/2f09faea-d700-4a4e-8765-867d345f3cf9.json and https://artists.proofprofile.net/proofs/artist/2f09faea-d700-4a4e-8765-867d345f3cf9.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 0xd26e39383dd5d5d20f6372b76a42de1a1f069e4dd6929bd8d73cb133ceda2b63. 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/QZNWS2278993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915b0027d2319de7060dde7d54a7037018de21fe8f9470c062de1c3900fcba41. 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/QZNWZ2259710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b64717ae0e36fda210f97611c54294f277385511dc59009acf02aeea5f79c0. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZRP42266362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab9f24776c839a2a79c9265712dba34aef2d9800d3881a31326d8f71032d7ef. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZTAY2292621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bdf04e4c4a31289121ac93c227528a971c6fd8f99d4ed2fad469f76bcc78e2. 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/QZTBD2367190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdc465c9dc79c4effbaa44ed35cca47e255897396e14d9bd884c66b66b03b16. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTBB2435124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7491c35c5be5f644c76f3c09d0098d4f3d34860412e2d7cabcc03eb1730560a8. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:35:41Z), 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/QZTBB2435125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1030e7fca144cde2459576762cfdd27e7e289225bba06586f933f91894599c3. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:07:10Z), 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/QZTBB2435127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f807d97bd382f1b92221bf8b69bf763048dd41fe7e0bee46c9498a0a53b5fe6. 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/QZWFG2567005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6456c9f0620191523fec9cadcc6faf6fc821afc98734b387a64d0f75ed3de22e. 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/QZWFG2567007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa411292a3b0d5264951eb35ec202fadea5e24af3e8d8ddb4f149a3f72dd3ef. 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/QZWFG2567008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137114004b3f3d9bf09f6774e96b7e3612e72cf956ddd0204e6ec14932109abd. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWFG2567010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61213e708528282aa1f59eb952c4051f2485d7069c46de9d5ee0898336ba020. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWFG2567012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cc5875d544d93f0f408a136c5a9f6e6123c686ac7f1ed03c03ba0e0fa96b50. 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/QZWFG2567013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c727c4d2e2800546ff2cf8d1fb7d66467a7c5f3bbf515c320073a3f0a87c1fc. 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/QZWFG2567014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d9aa4be68e79d4219b0c301b0ec407c175e1682f50ffc531c18b26c7e56e85. 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/QZWFG2567015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47642b705cfca40836fcd0399344a928a1dba2cdd40f0fd416163fe8dda210e1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFG2567016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdb90343cd5a298310552cd6bce4d358a95e74a9316543f71ef44b4f4163b67. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFG2567017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d1ed14bdc92c18c8379544e48c042bc55323a6fa05bf8a1992831422195872. 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/QZWFG2567018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce39092763078d0686b2cc119365a6be2c33554de5de7452d1bc14cae7d42392. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFG2567019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9766967ef459c32587f6078b5e5e0ba61b19c5ddc8ecfdd6fb1e925c88287331. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:41:19Z), 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/QZWFG2567020.