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 0x782fb07d883be989a1b04d3f5f651e29f1d722502ac2f20e3f9a1e2a7ad30da2. 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/e8ddd834-84f1-4a82-a678-68d3f0767c69.json and https://artists.proofprofile.net/proofs/artist/e8ddd834-84f1-4a82-a678-68d3f0767c69.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 0x16a667ba440c50dff73277042e4abfa74c296de27c9a29f0b85c1507b1c6d80c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/RUA1H1768109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6971a7b23afca65a49f393f941a3ba5c9a53521930a07832407bd4a20c35fe74. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/FR2X42460197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee2d8c8f487d7f36541f78c54d4132d86a6146d4ccc2d44b4a9a4a024e39f11. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/FR2X42460201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e3b813e71eacb622288d033ddd8f49bf814f18b640d866e2bf6301c3a53e21. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/FR2X42460202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b19b0564bcc105125b732ec4c07c7025469b14f68e39a87bcc1bc817126f62f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:25:16Z), 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/FR2X42460205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7018e0bb7a307781a2bc3b6d7ac71a33a7efa46974a6b9c3c0ab35c9c26ebc9. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/FR59R2418277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42547bd8f8e576e6030845e2041c20bf9822d0ba18cf3340a8cd5161d78fe3b4. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:41:30Z), 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/FR59R2418280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3922b5b93a8cce46b6b5f1399ee0c68cb9ecbdfe9dc0b281eb6a3220173d49. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:32:17Z), 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/DGA0R2304613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9388ecbe71c2aa30ed41d5be25cbd0e8e45dbcf95214f323053bcd698348bd8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:52:55Z), 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/FRX762421887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af723959346d025b8c9d3bc8d77966d0b3b71af7da6b77ecb1554ad5a4f0061. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:36:55Z), 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/FRX762421885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b158dddd55d6c6540416deb32e785ebfaa64c9df0b7bb0498b5151a5367ca8f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DGA052376413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3e5d218faa963ebe52ce005f8eb93d17397d74fb6db2081ce7736c8fcaad2d. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/FRX762421888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446b0b59c74204885d703ad6bf3970825a00521a05003dfdd4dc7760918ab317. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:03:19Z), 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/FRX762421889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e20bae97338fb109a92120baaa4f29dcb4b14632c56e5cfaa33c7aa25734f02. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/DGA092410960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d01ac2aa164c880fa055658912e6c00b27eee4598fe16181f5e4052dfe48c1. 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/DGA0T2415803.