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 0x8eee210856355f87ba70f3f5ce1c04dce5f1f7b7f13c9278a0c326bec7363405. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7c31f87-7a8c-4820-a2a4-11e58cf3c392.json and https://artists.proofprofile.net/proofs/artist/e7c31f87-7a8c-4820-a2a4-11e58cf3c392.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 0x8db32ea7e0d50a787f47dfa3188c462b9b873a768e346d58b93a008e3b176bf1. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/FR6V81105052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c26ff0b5d8d0ec4b42220081a91a0e4388fec78a925577a14f1b49597c9b8ed. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/FR6V81105054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a2115065dfc1ee76b7aba93a6e6c5f6267add22556f2afb5071f83fa8ad7a9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR6V81105620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabde591855dc776e0c9260066cab169d6de389f0225095903dc5de598ba7ae9. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:24:34Z), 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/FR6V81105621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1505d30695eccf815faaf44e62ecc8f3f8adf5d37adb2e0214f35c8376c4e305. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/FR6V81105626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2413da3d590560ad1867b4a7cbea053e1814129199351d9cc93dd43d5777b9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR6V81105629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c364baacb46f8acd86dbc6c11de7fc02a224d6aec8c8ab78a25b5876c580a1. 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/FR6V81336672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4bf1a035eeb92380943c9997fdef33e6d0054cb86eeb280ba8d1969d0186ed. 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/FR6V81609196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab797bb73171883319ab7192032f1332fe5cbd390de1130299a7c8cdd5f9fb0. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/GBVBG1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853b6bccbd59820c8ad2fbdea8564d08a9383db14bb111599fb7c0cbcfa3e680. 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/FR2X41442107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c306cc5d4620ed35cab1654ec8871854d12a488bf1b803f3f0b0930eafe1d0. 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/FR10S1504312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38acf0216bdd9abe45a8f64a4b6a64ddbfc13f7ba73c6525d87ccbee823efcca. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:08:00Z), 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/FR10S1504349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce5eaedc832d05db870572a5b212c14d4b5e16b6db45aa55b2804a45dc0cb2f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FR10S1504311.