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 0x9d1b2c298a02f8efb31ffa5ad1271f7ccd1ba3a9bf80f048f3197d34fd361155. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2f56c0d-f30e-4443-95d1-119cefcadb20.json and https://artists.proofprofile.net/proofs/artist/c2f56c0d-f30e-4443-95d1-119cefcadb20.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 0x3126a469e227846e15b7a8daa2db583af1d29437663cdcac63a182633609fad4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ARC571902496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911266cda858766858aacb50df6d6bebd558c82bc0698cc9b7c14e731e976d91. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/ARC572003409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473d68cad0c45602bacb87da9081dfb225836c5c21423f6158aca20b2d75aa15. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/ARC572003907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdccf857e5edba91ba3cbc71156848abe570a0231552ed74194da2630e525adc. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:29:16Z), 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/ARC572100292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb4d20303ba6c0b604fe846337eb2726a6823b81937adaa2fa8c543e4dec836. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:37:16Z), 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/ARC572102815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbb905d89ae8d6337f8327da238d1e0afaf10fa06f3344d8f23f9af7f56c9fd. 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/QZNJX2230125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b3ede3669a727cd94f80b7e9f05d0a54da8805cc0d423a11ff096c9b76cf01. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:57:20Z), 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/QZTPX2266721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f60d564be517e9268a18330107018d423539000a667939df366753265bf223. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:44:10Z), 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/QZ5AB2407112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72509a15b79a1a7f6dfacb22c7c010b534de2cee900689ac17fa6882fc0f9e34. 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/QZW9L2415511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f8ad2d5639d6cdc0a5a46addfdef969b175379ac340104b483fb0b8b63e236. 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/QZW9L2415512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00af196bbae74553a2cf6e229b2e65b43aa9f201d11da45da96245970e13f937. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZW9L2415510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0daf27a15a62d473ebc9d3e55fe22e11b966a83f3ffb29c800f5ccfb9fcf6e9. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFP2530621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eba3c9073bf681687162e8c8132d7aa58e6b29fdb7d65418df63942bc49f86d. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:54:53Z), 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/QZWFQ2583271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ef0f4f4a18fb0d8acfcc5cfae823c87a4817b48f70492f8e33d7e4ba906946. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZWFQ2583217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe7681a69b6f15ef3bf1dddd986fe5b3be8eae37e6a511af70fe9302c9e0eab. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2431431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3416771e0749b138ca26c89d1b4809acbd62b4a5dd1100446bf508a9b201b1f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2456530.