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 0xc1ffee08ffe8cee6c9f3842149764732fa6d21bb2b08e1977c721d32ed7b9eef. 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/a3249b05-19d5-4b00-b039-26e0b72fc6d0.json and https://artists.proofprofile.net/proofs/artist/a3249b05-19d5-4b00-b039-26e0b72fc6d0.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 0xb9667be1777fb7ec6f2b1b040d1684fbe37af8fc4d151e9c1cdf5d2b4c349427. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/HUC591800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f8bab3323facea3bfae7b1ae55d1b4815ff9b896b0dfd014f6da405af6ec37. 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/HUC591800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaad71d28d92cfdac33dbb2ecd0181ac6ac98002e8228fa2e03ebed3eed6e68e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/HUC591800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c89818398c86dc1480e7e2852ba7b18eb3da9d6d53eb4c22b7b4125925c4c0. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:12:54Z), 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/HUC591800010.
25 (Jubileumi Koncert at Barba Negra Music Club, 2015.04.11) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96616b5483338dd4bbfab7edb2e7c4de97ce978ff3f5d7e5139df7327b3ffce0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/HUC591700308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f889ed49f323078c38777b6d549a975580193e70463869e345e19cc42b07bf1. 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/HUC591700312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898dba4f84241472514e12c0c975287b906fc58b23b8e0ea1b98b3fc6bfe3f38. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/HUC591800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590f4ae305c12e0ca0c342ad44404f2d09ca663312cfb9e97b4ef3965e4caf09. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/HUC591800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805921e2a84142da891b21f1b31f1ee375337a109cb1ea9f2af6c4a0df5ee4e2. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/HUC591800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8977c728375f652ad0f0c2cd799254d0231f427f035613099973d9eca65e6d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:41:17Z), 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/HUC591800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62477a9311f76476b23a33a922593d43299339d49e8fa30d8504a7ae9f370487. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:08:14Z), 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/HUC591800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a464ad7f10fc66b0fe589c086dc39e203234a2f5f6367fd9f211ef6ee2e7d31. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/HUC591800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71191816721119e0c6deb868bfc36967282c63259130d922c29dd1ef39895998. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA031500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb9d92c3e7bc076f999920cd392effd4c82415349545bba63b00b44d70fb944. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HUA632400562.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch