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 0x5bffb35383afc827abad55ea301502a89f822ef4d7d6bcfa1777d3ceb64dfa14. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/278b5339-ebbc-4360-b198-3866e47f0aea.json and https://artists.proofprofile.net/proofs/artist/278b5339-ebbc-4360-b198-3866e47f0aea.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 0x44e30c949f70be43443dadf255f7d07873d33d46128c165aa74371e80a62e8ba. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTAT2553994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5b5aed724a091d7f44f557bb14fe6d375c9cf0f9c88513e02588881a41a156. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTAW2501435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b71df5b762f66b25f0899e6723a26c25350eb68892f59eb6bd5284c058c918. 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/QZTAX2596522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e973ea4db1be7ff39e002949ae412cc99bd5d240459f540d77a28ef160ae8c. 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/QZTAX2598776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d21103b53356959e5b082edccbb97c66ed4580817dbe297f4b8d20a4474904. 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/QZTB72546053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b2548d3173b30bef377225e12ba8b7144242b30ce47ec7a7f6b350087902d0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTAZ2559982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9479a2754f027e8f62ee73f0c1137727e334df5d6892c36db76ae3eb3ac2923e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:01:04Z), 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/QZTAZ2561259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bd5a9a7af806046acbc8083b9cb9656092225e72117102c82abfc129a4c8fc. 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/QZTAZ2561253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea0a4f847a1b6694f12b2c7ed599e36e768be22a0e9919155b1aebd368a9f23. 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/QZTBE2568775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab82515fc6b7e07bc499c0ee090a0f6eb546177b588519db2591bf09902e512. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWFR2531809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f9af415712daa7ce44bebf157261bb02c4c24e9d5593bcdb5a7cab3b98e2bf. 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/QZWFU2511831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0d5d0f308c3219dd6c1f1eafdf30711870f21ce89edb37351ea1a5aaaa0a61. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFW2587078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30b326e90c375883189a4e6608f0639b5c32cc79fb5e5b478512be3b75d9a99. 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/QZZ7K2531476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d46eb86d07ba8fa65fc4b19becb8e9297e2bcd34e1073fb85dd80e2ab94afd. 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/QZZ762556018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16c39caab0fe6c930472f4a4f329859192970c2af7d817cffff2e95cf484b3c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ7K2529300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25f5ac129770d313abd18cce4a0f8db6e5f57423986bf8a5b2eb6178f84bad2. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:12:24Z), 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/QZZ7L2526753.