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 0xaecd4945ba9f7d1320961f79abe1b8edd220f045965b80dd02698acc3c13f922. 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/090b86ba-e29a-4cbc-9bf7-8c14ba1c040b.json and https://artists.proofprofile.net/proofs/artist/090b86ba-e29a-4cbc-9bf7-8c14ba1c040b.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 0xbb3280be825e680dbbbfeca2e6f3c3475d9f34ca8709861728f1a0b495ae8137. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:41:27Z), 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/QZ22B1627386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cee86d1f9ae5891bbbba4449c666779a9a42912df743c27a0ff50044131c2dc. 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/QZ22B1620382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ea35d0bf6dc2903ff51c4c82373b1fb73c8103c8794339db998587014d09e4. 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/QZ22B1620393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2ea5e7c7c9e1f5b7993310fe20702230e68ad291712ad692db8e4f68858d81. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZ22B1852835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6441bd0cf0dac676ab15c7ff4eecd0f0a615af02ec6c55b2994e80ed87c31d. 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/QZ22B1990260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3a25b19e1c32ff70ef37b73e59ece364a45b4e5cf76a4daf6dcd22bd132dc5. 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/QZPJ32172044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a6690a554e28a778b9f5885bfdda15be5b7edd04d70df926f05f40abcf12ac. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/CAENV2279176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19906a2ac85c0d4331454a9af425e21a94c9ff28ff0e8c16103e93f717fb929d. 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/CAGOO2207417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394fbdaa7b8b6cd2dc8ce956349c55936d4406880d83c3399f0efe091d6a32d3. 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/BRK7Q2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8f81175a43c44715b31db6b7c563fb7dcd8a77bae283e4d0141a71a514ec0e. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/CAHQJ2364821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2620e7024137b61fd034cc21e2f4209fd78e12a9b298578676442eeb47e3c61e. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/CACWV2336603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c95712f00e84f6ed94d756aee6a0d8d297124e6493ce6eca2e0d1430e0d947. 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/CAGOO2351913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b92e6dc0626c4eda7362ec0c8731171ed9c5044feadb3a6707ad8453e54fd83. 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/CAENV2455736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e99c7eadb6384b565bdae11eebb54f7e23e99f0804bffc966ac46a3ced56514. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/CAGOO2444262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54577cf6378100c17e252ce5d4978e3d968fca2450baa8d5f590bea8209d6065. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/CBEYJ2412458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73085518a0cab1a59b873280dc0a550316be9975437369afd1cf76c38e11fb08. 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/CBEYJ2591763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b35eb909d41194df07130eb5998ad1193d2371d46e01f9aa22e600bbf97ba06. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:07:51Z), 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/CBF8B2508748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca174d5932efa30f225c526180b70b85f96ed59d9791773fa53aa92e48d85d4. 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/CBF8B2508714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94434ca12956b997ec2911c7df2cfb6101381f63defa338434b91c3d9d3cd34b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US7VG1784284.