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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c6b96dbba84f0b5d2c267e2c5a5fa3d5a2b5e732b522d00f06137c219fd035. 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/d8149b98-4981-4b66-b6aa-b0f974834120.json and https://artists.proofprofile.net/proofs/artist/d8149b98-4981-4b66-b6aa-b0f974834120.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f78cc22977c1a1ca8d7ec151508bfe723c5aef4d4d5fefa5f39ef9def95ed12. 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/GBSMU7593190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944b904feaf531ace97cf2fa3a14e2e894d33cb3502788abe85673c159ee77c3. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/GBSMU7593198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963886cc594a6a8e50876abf006f10100f203c317e4816a21e5151de5204c82b. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/GBSMU7593203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a43ff64cb6742dd3307986c0305a130157e37d41e5ca436ebc88bb0439e883. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBSMU7593208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1c0206d3723cc7048f120097dd3dfaf16235c1aafe0f54b4c8b622dcf56a91. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GBSMU7593210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a692e2ed83fccb556ba49d853a98395feff0ca50db8f76dfcd7f6e416e8ae6. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/GBSMU7600841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057cec8242f027c87f39445d6c13782b64fb994fd346b935fc61a01102bb1c61. 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/GBSMU7600092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef04278f24245dbbbefeff049396ee72decf2d5c30eccb825b4832b55eb960bc. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBSMU7600093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139e5043a03fa81b138562358bb9033b891d5ae6ae9595921e9c605ee1b5117b. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GBSMU7600094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe108ff17ec3c21e54a04cb34ebaba1576917562acf3175130837ba94dfc0adc1. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/GBSMU7600099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9eac4289425538431a4a912ad8a7d4aa34b90bbe1fc9f7a4a4267c82dbae193. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBSMU7600101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727e76a50140f369a63f376c58346b9a3f15ec89d110a13bc9c5c96b21161fa4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/GBSMU7606216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3fff41470dc6c60a4a28504543c3a541a8333db8124999ea8ea9cb210b7ccc. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/GBSMU7605571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a6352f04e334315e1631cdf558419ace71ba14ad26375ff667053d68124386. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/GBSMU7614629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3206cc6ae7e7b3396f97ce6c012ebd5d654bf63245c531805ecba811948f54a. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBSMU7616611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c3a9046a3194ff0875d8918190aa8baa955636aa00fdec6faaee4d53b3d359. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBSMU7616614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6682cdb4ad792892e4fa36901522c54d7dd92ca211b4206e55e20ff3e0320a. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/GBSMU7682830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dbf0bb2697b01c44e7e95706161c1a4a736cbf8b0532591e2e170bb10436f0. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBSMU7682832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47be83da5b1bab68303e31f2f38202bba96715692972531e26de5c438a97540. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBSMU7627816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57601a9f417c2d3c3b35feda4bfb202dab77037f770a89241f8bbefd027d9a8a. 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/GBSMU7631904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7c67ffd74fbe5f7eea64da48e14e89f0edaff15398fed790df0a61461d4ef0. 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/GBSMU7631908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe059fedbf87db508f9f8d0bf49d2b3ea27396de08db97b4f02adc638dfc8a137. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBSMU7633073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315946351edcfdffac1bd9c362e98562a5aa6b7c5818cacc673512be7cdc82ad. 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/GBSMU7633237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1c70cadc906b2921634c01f3cf29b2178b35a2bdcd05f17c0440e6c1ea788e. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/GBSMU7633248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3173b89bd691c02bda3068c61824d46957863ccc3c75128ac9b9b1ca309cc4f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GBSMU7636996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adc63745cd885a1ddaefc19e86528599255a9e803f7d61e685eee0b657c50d7. 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/GBSMU7636999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a7392c133e80ff4baa637caa481bcdfc33f256365ec233c3d7b2a5f3511a6f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GBSMU7653800.