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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 0x17e9eb48401204de85fcbae604a73a869b54c084b7f0191b03d385dca8e401b6. 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/11ac3c0c-c41e-43e6-8e88-bc65fcc18c57.json and https://artists.proofprofile.net/proofs/artist/11ac3c0c-c41e-43e6-8e88-bc65fcc18c57.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 0x881d167e51e92112bc495f27c6d95e68405e6b1bf23d54e78c0e018ad2843e6e. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/USA560673691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4a472645062cd22354faf3f43b193c3147a79c1bda8693caf8cb947f81d3c4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USA560753146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49613b49aef4f020e60c28481e17a3c75f7bea3771f128bdc1a8b165a922fbb1. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USA560753150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1274fa1fce4ec47bb6fbae51aa17b11d35cd65049ac87e16379d0945cdd5dea. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:47Z), 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/USA560673648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148e0d3cc7739e111930582ea34e6b98cb99ffb0bdd299a0ad006367497b3990. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USA560673650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f8bfd6d98c8bcc6854a0625b28589ac31cbc0e429c912442bb2d7ac6506e7b. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USA560753140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24c25ca8fe8e96cde49445ae2554dcf3145dc7bd6f01e3887a20038cf256aae. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA560753141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4a472645062cd22354faf3f43b193c3147a79c1bda8693caf8cb947f81d3c4. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:06:23Z), 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/USA560753146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1274fa1fce4ec47bb6fbae51aa17b11d35cd65049ac87e16379d0945cdd5dea. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/USA560673648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148e0d3cc7739e111930582ea34e6b98cb99ffb0bdd299a0ad006367497b3990. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/USA560673650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8425ed10f4a233d806defc581b75c6566f84041f4b601842b226196e62d28583. 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/USA560673651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c549c1c8d346bbc7daa8eb9c456da75cadabf46ae4b0dd07c7f13b58aecf8be. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USA560673652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c6193e59991bbd57fad41a4238daf27d3a9cca0b59976a384203d77b54c61b. 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/USA560673653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd786839e7dc4a2c004cdf38a1b42435f497342917bf3cc791d9df1351ca3ab16. 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/USA560673692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb7ae11abbaf32ef8e8e14f49d8f33886ae5b4aff87ab704e0dba8824ea83e5. 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/USA560689842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439805d3eae692e86ac56c449b7128b10b6fe8b30c6bc7d55cfbbd415dd3f52b. 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/GBKRT0710934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0efdf0767e1e6ccca84acb3ddf6afdb3edf98ff32820129c1b15f6ee1f49e7. 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/GBKRT0710938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a344de6986940788ce0005f00e11c31b8a77c83747fc60713099f163da85b3. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/GBKRT0710939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdfadd5190032e795b2ba57666ad5458bf6228faf80a43ef88ab860af5f92a7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:15:00Z), 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/GBKRT0710941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4075546e5b802417104edb8251dd7a6b33f969d8477cd97766da2f9ab5da2e6. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/GBKRT9520702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec08d43c85364c80882ab92c20d3062e85b8ade545d19979528f0e80e1dcebae. 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/GBKRT9520704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcde5d0cde895a3dc033345189587f721e13ff451a24118f50e96898319c1c87. 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/GBKRT9520705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22848eb5ae24babe988c124ed7b1e313d9d995e1cd7a611c61f503288eb15345. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA560840430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc9a34609ea8aa3aa7a865638800069039e390e613b78272b2d527d2188791a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA560840434.