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 0x19863fd4bcf2257ee972782341aefd9077b0ea18d9d972572c637f2da99160e7. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbdc64c4-2efa-41ef-82b7-dd247f830838.json and https://artists.proofprofile.net/proofs/artist/cbdc64c4-2efa-41ef-82b7-dd247f830838.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 0x70cffe938a6d5c75d32d7d727faa5b09fc761e28aee1cbc56caa630aeb964948. 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/DEZZ52112952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26533f83108f9128524482afe59063cc6f3ce53933fb5dddc360ddf99e1161dc. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:37:25Z), 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/DEZZ52112953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580df6c8a9d5ae6ad6ec4976077500a656b55018b451ff917934ff22eb3d1b49. 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/DEZZ52112955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28660013901dceededcc879f09878ffe573cb1b27a7138c2fbe8cf5411ab5106. 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/DEZZ52112956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91947647ca568e6fc268a8345ae512009745636be6d09c4592af1e632d08f0fc. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEZZ52112957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd383ea43a0988ad92a9de9ad85661f1e5f9a47f7f637525cf0469fd37973898d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DEZZ52112958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3b6835cd9d176625352c2b3b27c8329b78c9cf92fcce19ba23d40a61c8eace. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:03:24Z), 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/DEZZ52112959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9651addf232b5092331ac4738abd599f59ea6a86032eb8f6a7030369354144ea. 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/DEZZ52112960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f44f8ce1faf2633bdca98e842668126cd8248c753fb13eecbb6718b284a1310. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DEZZ52112961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073d0fb32aef4390dbd54da3bbd17599618f56739c9be6c24643a8413d20ecf8. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/DEZZ52112962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5078d7c66da5dbbeb9722eb0ea34e15c4e8898217344949ccf81b90723f266. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEZZ52112941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94ade83c6dcf8453285be92bd1097de44eec2b7e703dbceb8dc390c9885b908. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEZZ52112942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092c338d3f0de1ef5c148f68d9987d3923eb6218312bbdbbffc34970237d12b4. 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/DEZZ52112943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce76a8fd72b2f98f5c76b39f0191ef773889bc757449badb624dd3c6162ca7d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEZZ52112944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc6a9b04a0f9476393515614ad29400f8445df47c936fe813467221b167e90b. 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/DEZZ52112945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2101b4af0f388bcba96259c5e1871e1acc0a6059ed93a642f1e670d83679310. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/DEZZ52112946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf45cde813b89d2f09ad855514024052695e74bbfbd5fba1f48cdfe780233cbb. 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/DEZZ52112947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dd67764e8d2bbdeae575f3b2aec2606b42568fb3f984211c9c04b12da016a0. 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/DEZZ52112948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e9561e156829500c7fe2acb7f7dfd39a583841c89d439546a0803c9573395b. 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/DEZZ52112949.