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 0xa987bd340d9ae3a0cd48d4983973eb3363f05463f7a3e2aeeb2f22f3dd567a60. 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/7a299f5d-fe27-4849-9ee9-711c78c9f548.json and https://artists.proofprofile.net/proofs/artist/7a299f5d-fe27-4849-9ee9-711c78c9f548.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 0xc5ff8ede7ad1c06a99ea7d36f432d0a966e7334776f7cabd043d1cb3ef80c699. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKE022234739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4dbce54d6ccf6b3fcf5869a936be1bb73e22c6245459884ca98bb169dd26d5c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HKE022234740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa494b52f4bf38e7272141d3bb704cd637f862492285e4b9d77a9b96bf0dc4aa4. 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/HKE022234742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c3207f3c27b77e8966242a5318390dbee2e643e0b0541c96a10e0dd79afb49. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKE022234744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb6a9b72525d4423b7b24fc124bbc784b6cfeb7c8cb3ce4c307daa855c7a717. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKE022234745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6076abc98444106de6924a9302f79c4a8df03212cc9f4a2b89742a9d4a71ab. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKE022234747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f4c4ed47999c2b681ecf71aeb8307ea463abe6168b0aa45ed15f29211cc146. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKE022234748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f2b119be8c97108a767974a1308d3022346d99fdeb5ef0483e7debc99a9ad8. 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/TWAE32403559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82ad95cec8215bcea8ea6f848a94d28954cc9798f2a76f40714aebbc7b153b3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKG732435259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4193ba9a08c236e0a8d37dd474464810a268d65346c139b85cd8cbac90c7e609. 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/HKG732387956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1389c716a218f2f1ab1406032e1c89fab698a9405b219ef7f319cc81796aadd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKG732407417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8039a2c1c78482f40a64cee56bb2d9752c0fd5a382790d9dd946617a6914528. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HKG732505185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff28c6d6db8e46581afed329882a5de076975720c0c2653ce5cb6bd932ae294. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG732505186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd4e27261e6533085a2dccf5156bf145da2a91efe4c6cdbca1bfc0ab040cdd1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG732505187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf33acc8bfdd4d42bcc5aa882cf79265cebd91bc6ec6b844671aebf1377b46d. 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/HKG732505188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81aaae61e19e50194012f6df2449b31ed92494a90b60d14333edd39dcab29107. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG732505189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2188fabe95344ec2489dedaee34fe0a0cd85a6d3d44490e9d0755c836ccbb6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG732505190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04809f14be133a090023d107fecf0c35b35cb6d5c48c3f58e7b11958eb6a94f2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HKG732505191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed5f85a3fee7729d2d3f149695e63ba5909fc0b82a886fbc72b68636e352c51. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG732505192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78de638a08a11275df455625249acf22ab2a8cac17117970ff37e5cc7f7a729d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HKG732505193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8258b5504161b337a47726f1d2ada4d7a733c5cffd6ce2debeef472ed533baf0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG732505194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c238ceee9d753bc5d4c5e71d5cfc9449bc56f2f4ad574029eebf1d788b3e8a. 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/HKG732505195.