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 0x89c3f967d2b9d4268c1508d5be7873952c3fb4b262c68fb8df66e7f0d80695a8. 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/b12b82bf-8081-4beb-baf2-f9c6dc78e440.json and https://artists.proofprofile.net/proofs/artist/b12b82bf-8081-4beb-baf2-f9c6dc78e440.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 0x3c1b18eddc2b4d1962364ca5f98b00147a37ad5118a4fe6e9bf25e10e528d7e2. 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/DELJ82035137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350db1a09ef90ebeb1d0ae7da63059fb3c96c1507f752c78702aebd8eae3d812. 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/ATT802016001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87216d52e164beac3f1948e54bab6e22d5aab4d480046a106f9a3031a3a1e86. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:25:40Z), 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/ATT802016003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e506f1ac3550d0c1996d74b1b2e4fc999e1e6526c48d181a450b594eee6863b. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:31:37Z), 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/ATT802108009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3485fa28b146f8c06c49cea75db91e5410791e42e40e635b31b724ed6d234b. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:03:27Z), 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/DE1AO2210066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec33b65be2818e9942ee3fc92aac839c826e7943fcd23df1bc58d4497f6a66f5. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/DE1AO2210101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0b4c7acba850a5148c4b0a1d66712a03e9433d0984eb0ceb4ee3bf931ccef2. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/DE1AO2210137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5be7ad47b313713ce456b9a69d93ecc7c5528e2df59f1a10ab78b434d86484. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/DE1AO2210055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec33b65be2818e9942ee3fc92aac839c826e7943fcd23df1bc58d4497f6a66f5. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/DE1AO2210101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52be52bb7288b3537029dd625c452b7ecfa5a637d373b564473017a94ca0962. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:54:21Z), 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/DE1AO2210131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06024d8bdc9d84638de83d59852c5e9ed52b7c5291a90dd9ee5b3048611c6d08. 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/DE1AO2210136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3485fa28b146f8c06c49cea75db91e5410791e42e40e635b31b724ed6d234b. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/DE1AO2210066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2db8d1a372f0bb393036214a62ee574a100315d82061539c42660518b646c3. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DE1AO2210139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f2effd1f0693822a1212e0c450ab323553e0c35f4e12001e683de4239912f1. 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/DE1AO2310243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a3cd6f1ec9d7dcd7c76986e83b183d11cdb0f01cad7a318cd39efe1cdedbce. 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/DE1AO2410251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2275a13c8d3124083ad97f3c92f0c4ee9be47e268e4984982876a3080b11cb79. 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/DE1AO2410250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e7b750e63e5e50b15ed24c9fedf66134dfccf024b163286ecc65584c5a998a. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QMBZ92524798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d918662df0141d134f7c943770746e42d1876eb9d6df934797c3924aa708d2. 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/QM6P42588854.