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 0x828af4a9944b8bccb632442070fd1046830263cffbe7a6fa90495fb0cac76c2b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8cbe901-7f39-4f08-8a42-1410435de490.json and https://artists.proofprofile.net/proofs/artist/e8cbe901-7f39-4f08-8a42-1410435de490.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 0x146b7b688795546cfb910146870d8b557d7ea5637162e860a65d27caa74b895f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GXH2J2572009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537a0620a4e59396018da7ed985cbc09a04bd628f9da3e5f4f411f43a972d263. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GXH2J2572011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010fa5c6abd2bbbd86d51efabe0a17503a1546f02fe954979dbaa43ddd02fe84. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:44:53Z), 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/GXH2J2572043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c5905201785c18a5e51b0e1f7564031675fdce63c6c9587c4b634d696f4fee. 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/GXH2J2572002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a1c2e8b497d6ebc625ea31440fd3b5c7c5111b9923d98a645182981c1fef08. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:32:33Z), 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/GXH2J2572012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69be1db19cbf4789687c88fcf32a9c269405dc10f1cee1af42536aafeb85d1f7. 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/GXH2J2572041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991ab7cacd26387bdf01fc0d4a21d333cd1f6d9a69b1562bfae8fde81b9e26e7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GXH2J2572044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004f9199306824119cba289f7c004a43151970c48dadd3943b01841cd2beee9e. 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/GXH2J2572004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7288e6881dd7c24ef3422b6fe72d0907aa52733efbfcfb159451c38e1eeff8ee. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/GXH2J2572010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ccdb6a0fb9ca6425eb72c379dd6699834d046bcb5b50254c6731ce4eb69641. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:23:56Z), 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/GXH2J2591205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2813325e22baa25f320cf52c4eac23b0b51633ae7f6235f673f6872afc28a4e6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GXHAF2517367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8191d2aaaf8947c08f134f07b30ba5649384bc183dcceae284f2d5727bfdccf2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:02:22Z), 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/GXHAF2517368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ae6422a7f488d61c6c472b144b7822e842a8d3a02dcbc9d8c87b92582d3f88. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/GXHAF2517383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985ecd135c007d6f12081690668767ba93d84bfcf877cca95c79b34ea1c527d3. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/GXHAF2517380.