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 0x9a7e4bc3589f269eabfa5daa02a4284f0c9b70bc2dc4c6f568d1e1e2e4e7297c. 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/54e13fe8-035b-4938-b6e6-acc91a6d57ee.json and https://artists.proofprofile.net/proofs/artist/54e13fe8-035b-4938-b6e6-acc91a6d57ee.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 0x66aa8e433f0d1de946dff1b4fda9285b97388535bb91a9ac249dafd4966280e4. 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/AR39V1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64b26c393e79ce65e948ce257ba27a28d0df4269492198d5a4328fb5ed18cac. 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/AR39V1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e6e694842262836b809f700f93087cbadc7ca33c75654d943a6cc1c64ae0ed. 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/AR39V1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee84179657fdad980ea41415717764662b4c5ecdc6a5d26a37064a07b0e91191. 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/AR39V1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61cc1ae9941f21f1bdbffe5955517cc4c04bdafae22aa5856ef61ad41bdc610. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:03:30Z), 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/AR39V1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46192174f1cc37b9a051e28204599a6bf11b046400b099ab140918baab01c5d. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/AR39V1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bdf6230c4585504acb04650369db24c6ecdccd5ca82603a3bce3925d7c190f. 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/AR39V1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19be3101122043dbb7973de61d36388f230900234633870fce23cecc1eb20ef. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/AR39V1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1574e757f703f2586175377724435743b4497ff37716e2ce382511fdea6eb587. 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/AR39V1900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c96f83f8f34835b9491566502195b3307b5148a1352a0f0f3c009d9e461eef. 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/AR39V2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c8e350f7a886c8f78ec77e3780ac04928b0d94b341383c3ff50842401f251c. 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/AR39V2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84873696f06adfd6ae4237ace7596a9def5545a0fb9a74c99622c50b791e2aae. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AR39V2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6ce285bb3a167c13308a546a4fd32c4088abceb1b88f8f288db5ae2479b8c4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:21:47Z), 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/AR39V2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcd5e9df59e59905e19b66efa30848832f24887d3e2518262dfa9a737dd2f93. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/AR39V2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff5a56e5291a83becc94fb0caa71193a4911ec38dbee11e2cacfc8c41b00463. 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/AR39V2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cc96ba17707633fc8e93fc90f7ab9148dbf7d5e0abda47d6ca90289b1b3458. 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/AR39V2400012.