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 0x7b52387ed6c6090414c9d374f61754b3c8175ec695e35566ea4408a80dbd44a8. 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/9c6f9cdc-cec1-4d89-a685-9d29f8ff2f4c.json and https://artists.proofprofile.net/proofs/artist/9c6f9cdc-cec1-4d89-a685-9d29f8ff2f4c.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 0x7f6873e732259f3771bf29b6bfc99bf35ba64e6191a586d8df2925c2d271f9b2. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/ATBK71201162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3e7d58da19e478fbb11bd38b3f411970180363fca5ca3489ae6b145b91939e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:49:54Z), 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/ATBK71201568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1678545f81c0f4ca02184e44d53003ac6a442ed3d14251a88af95f667875eb. 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/ATBK71201801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c4e8431256fde2601a1986fc83acca44a824a8346dd54f57d29e03e59aef2b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ATBK71201802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f26a6976e13f1f64eef1b590ab24c55327e5a03eecca29fc84a07465392b782. 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/ATBK71201803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a06aa975d90982a4db473370b690e697203e78a131b14932ac77ceb98d05400. 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/ATBK71201804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d6b13f5676de386633e416559b704ead7f72a9d17e800fd33b17e59fc2af12. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:48:17Z), 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/ATBK71201805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856c4b01bd41c8f316819ceb0a8dcbe067060899418c1f82fe4e5e1b53f85111. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:26:50Z), 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/ATBK71206027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e631941e1b04c0c99b47f158221ec3d692addfef80e5f32cea2583dd14aa48. 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/ATBK71206028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c74bfefbe50ffc347380142225ec0b0d0dd0ee37f55e5e92a4d6290a0c7b902. 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/ATBK71206029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a7a10ced84f892a26bcab1f7f2d012c83a57e780a22390a1d078aea9bf4c46. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/ATBK71206030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45aba3d2a07a8cf566112c05b618a019ad5ac730215b02c00d988e47fd5ad72b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:01:33Z), 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/ATBK71206031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b7cd66af48a13000391b05fe057b9c0d16cf32688ff98c1de6ca2e36bedb50. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ATBK71206032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf985681808cceabc786adcdf9de878121a594f4271aaed1ac19fcf178a37385c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:19:32Z), 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/ATBK71206034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755bee798f734ccb8e4b574be12103f8d01f8d15e7c1922d4e6b2da9a6feaa3f. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ATBK71206035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176e1f758734b5a2766b59b91c8b9774744ff02e3a6ee745c41a15a023fa6f54. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/ATBK71206036.