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 0x4912682eac1c2ae50789d58c8b70e6385cb71a4e82d9649da4d84ebde55c71e3. 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/3b2c042a-b3ba-4acc-9829-afdfa87d7ab8.json and https://artists.proofprofile.net/proofs/artist/3b2c042a-b3ba-4acc-9829-afdfa87d7ab8.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 0xb1e2cb60658b0d0639b55ff191367c1ff3cfd9c804c97f760d101a5190117d65. 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/ESA011842706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fc3ddbb6a9659d625770180c924c753385dccd6fd65e0033b8a5cfa023bc47. 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/TCAET2046135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57084642a996eae5d102cc36b877eb3bc4a90d6196be6f15426278cc2326e610. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/TCAET2046878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce75bd3d860630326d0786d57b2f75f7120ce73ea8ae8a19d159d1ea72f3f5fc. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBWUL2052601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805783e7783016b3ab9131ca161446ce7fdebbfccbdba6ac78ab122a2d3c2467. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAFD2068153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde72d67182855c69ba26999bfdc62070c9274b1843b0e6ddab48781897c65463. 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/TCAFD2091115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fbbe8738a152eaf81011f84ddb4561d43dfda243afc1ff83244ee881326b67. 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/CH6541656441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ca9eb3527226b3b31b0249c2505fe9cc87319b1294f14b9bac51e9b48c839c. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:04:00Z), 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/USDY42114048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe281f80106f14db74c26483f8d6b1a67204a80135bb97c11e3374df3cd4af490. 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/US83Z2126182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371849466a8942db73daa046b6d2ad60a59fd3ea42453211d3c012348704e76e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USHM82196652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f445540758cd34069b3fddcd9828304e9dfa1bddeb56f09b1c6c8a46bd8c37b. 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/USHM92161292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dca6917009dbac28a5878fd74c3d6edb9e871c9650635b4ca9bc301a0bd679. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/GBK6Y2251451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02821b89842e46b98c0c2723ea34dc92de8a1d03a3be9de003b964d40b30234. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:32:31Z), 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/ESUM72302768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c61680751f060f9ae9c46031d489facf31680293575f2ae6697a48e2e4e67f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ESUM72401303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd426bfaf1f2abcbaef25d9873f9f177d6d02a66fa1c309e2d3b04cf967993e40. 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/TCAJT2548658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6790ba7671428c8f89f11885c0b765f89085fa0a98148064e2047bed2d7dd403. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:09:20Z), 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/TCAJY2512348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71f9c2efa69fd0f53261c73ff3ac050c08f7f2569540acb2674872b6b7474d4. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZG2X2504412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ec2f7933fa3badbb6a787455d71f575fff85b491d104a668b644ae653a9ede. 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/ES5702200170.