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 0x5528dc33513f5a86a5fe29e79f1584203b51cf3e01d0ffb98aa5fec9a331bffa. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d250385c-e893-40b5-9fd2-d631ac66ec2d.json and https://artists.proofprofile.net/proofs/artist/d250385c-e893-40b5-9fd2-d631ac66ec2d.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 0x82624a5df1466a221467819ed2d3e44772b248bfcaeaf0c5c85be763d80b5643. 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/QZHN92487012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc212185140a3c7bf9a86a3edd8e666d6f3e530242ae4483d13f861219f6356. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWS2392315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a17f847aa71e1ed41a0bed0ca1dc0fa0c0a8abc2a66f8871e79654e2057bf0. 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/QZRP42203520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76eecfbbb295be991da61b1d14018c66a486bffd225f14259001315477e30d1. 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/QZPLS2197437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385f7dee1a3d4037286bc46e2c5ec7196b06be06824cffb9212f04eda6148944. 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/QZK6J2199607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9745eda038c90ea59893f08f5588a485d9d110f167446aab19f5007402952b2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHNB2191604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44821f42f98e1fdf584ed272d530e5056ccc99640ba1109059d58f67b2e7843. 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/QZFZ42122341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e89a11bd02cf6ce469cb4b2d5eab41ba069f88ea21c6b1c645bccbfb022f49b. 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/QZTAT2417820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3ca6c4aa6ba4d3a1e1cdf0bb7ddea07e0751c98f96723803b98884e4a45a9b. 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/QZTAT2417821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abb8cf40d1b2400159b230c0cd75b74a83dbd244fb4aa88bcf768e10bbb5583. 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/QZTAT2417822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5d73424e0535c460c23768df00dee6493529d84915e9699b7fc669708acf01. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZTAT2417825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65dcaa5a6826f335a16ec2a487b0982b68cbb7a2ddb040cb500bb8492b59e853. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM4TX2248228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1878af7bc550ac88d9ee72e486b477449e266f65b4d5b92d7ba23fb408a65167. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:06:14Z), 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/QM4TX2248230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc355fd1d8a1755cf2555b1f36434a2256b6d5ec697580bc6ce45730f6d169e3. 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/QM4TX2248236.