thumb|260x260px|David Batra and his wife Anna, during the June 2010 Wedding of Victoria, Crown Princess of Sweden, and Daniel Westling David Chandra Batra (born 29 November 1972) is a Swedish stand-up
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 0x85d0a1cf4ca73c313d2c986334dd6f869f401d75729033023529eace6df35df1. 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/7e90df6d-4a13-4914-8822-c050706511cd.json and https://artists.proofprofile.net/proofs/artist/7e90df6d-4a13-4914-8822-c050706511cd.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 0x0745e38fc5cc3e3f7ac3700f531b865c090d2d202bdbf4d73eeb2ef7fb82cb72. 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/SEYOK1403776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5370282a8b43f09baccd83c1bc7541104481b31afdde1cf3dae9aa7299c3b10b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SEYOK1403777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb538df4e6da48bd946804bfff854e8429555b64e19d2cdcad6b82b7ffaa43e4. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/SEYOK1403778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1526e7a25cea3345d7482b2eec57e0e352590e140849d3c97d1fd1abcf0cc3. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SEYOK1403780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde234145182ca77977a0af09c8eee6eac0926bd252a00ebfe6fdd90c855e315c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:19:04Z), 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/SEYOK1403781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd2b8581cec278dd12f691a119265e3c6d0ca9d22671615654867746bbc5670. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/SEYOK1403782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd76f33e4f5740770e12ae866e761afd7b651a33fc373338ce28a11b5cab09cd. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/SEYOK1403785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f56db6412273f7484a31dbfba40552923ca454e6719205b24a3e124f3bb655. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:46:44Z), 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/SEYOK1403786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b232e7b8f11175e01541d87e841821eee7145a4d3e92027f566147da8779b29. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SEYOK1403787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc7a89ed3dade590fd904e95ad9bf22e1abd54432a7481cc684a723a982ff0a. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/SEYOK1403788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f6ec1c364ef611311de80eea47148a324c6b43ff61517a2c1c28df639f1bae. 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/SEYOK1403789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab72f73735624df783f7ee71dc399b53278061101e43ac1d678d29e35ded397c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:27:14Z), 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/SEYOK1403791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05a53f5bccaaba3a86f73d9db082627eb5343821d2e4fca02955c24f8f56a3b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:56:36Z), 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/SEYOK1403792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccc12dde946d9cb5d8e99a1bded323ef5354f589ac197d54c66f318a8c13262. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SEYOK1403793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc618c10b8dd01e2c9e80438b160a007f5703f5d87794cf036af64efa83befaf1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:50:04Z), 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/SEYOK1403794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc3be4cade895af225500f733965f071db2a656e7be2f337a4bcf6e34fe4902. 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/SEYOK1403795.