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 0xb03287be27e517168637bc9b77a2a3c21d4d6c0a724b7aa5df1222338bbb6ff4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee8dd6f6-947e-4214-a17a-7ffe0f49e40b.json and https://artists.proofprofile.net/proofs/artist/ee8dd6f6-947e-4214-a17a-7ffe0f49e40b.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 0x6549b07ec86d832082fbf192a90680bf51fd73b44a0cc0a94e96b3391093e0bb. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZDA72424759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff85131bd7721a23ee667e9d1ad485368a8caea5dbf12cf604b81cd20017cb47. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZHN32495432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2c61fd5ab468bdac5ec00a8f31a674780d87db769fc1023a703d4ac015dd38. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZHN72459086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b8b8398da6080472281eaa4e928b23daf392000e5f65900d31d631d2a62477. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:22:27Z), 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/QZHNB2416999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299edb075404fbb4f7049cd46cdd2b5719029f986795ae05a1be009e24dc5ac9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:46:59Z), 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/QZK6L2482321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1c1862a3f7765854bb59ed75759f9ee6fff8bbbff6963ff07568ced0686e5a. 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/QZK6F2424386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2f0b56ff5ab7e8e47f51ce68ec07ee50a82e6cc96f08aab78d716a4c61ce5e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTB32471009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9954a9066dfd0b9eca9f8f58607c84300715ef37f35c167c5c6317bb612185c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:55:48Z), 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/QZWFW2415743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb9a070a9f33ec4df56a15f8fdf63c57df4fc660b5b3303b76d54ee94d977f1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZZ782401203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12d7948c95cd297b328b030419bef4244d320957b2a22387691d2f4aeda75b8. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZZ7K2412431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4177ef3423562604d2c97ef3664ae07794ab8ecca9e25d1a1b70bb1024b80661. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZZ7S2460291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d71ea8c731b1fcd6e6af93364107a5c560c9606b0f27bf3568d242e043528a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:14:57Z), 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/QZMEN2593731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf384e8aeef813fa294537eafe8e781bd125b6e6050aa230796460f198ac50d2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:00:32Z), 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/QZMEQ2568498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263e4714a5476c70b1c093dab334be010102c50c563a0a9b18736087902524e9. 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/QZNWQ2506693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9358240682f5eb5abf35e2977bb2b4e79d377e2cb44f5e66da42fb36f4fdf6f. 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/QZNWS2561953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f95208d78b924b9d53354cecb3c09bc81ba24c1c668fd2c7e038550c14cec51. 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/QZTAX2547016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bde5097a41fce4ce023e7626059977b2013da601811536f259695e52f7adb2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFG2565149.