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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9525590d13a0c72c07c6dd9eedc47a734caa95dafc1df5a62e5b0830e7e547e. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48c294c9-5ecb-4647-8123-dab560fda845.json and https://artists.proofprofile.net/proofs/artist/48c294c9-5ecb-4647-8123-dab560fda845.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9408f513098579b4dfed816ce9c5aac3dc184a2d0d1533a913a0852a9e146850. 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/INR321900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14e2b77edfbd817eb9873e468054f9cf7b62822312ca7a58bf6d2df2cd572ca. 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/INR322100318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88c47150eab1b86917d7422057c51f73f0043bc5caeca6895b864adaba2b8ea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/INR322200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daba19bdfdd403cecbc96cdfa3e36067fcf141d3c05b2cb3f304a58f4ea7162. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/INR322200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4af8454320a2989913b4e870a974cb27ab0a217e445ff9fd13614329f07139b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/INR321600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4af8454320a2989913b4e870a974cb27ab0a217e445ff9fd13614329f07139b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/INR321600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e1e0ae9a800013ae86c886d0f16d5325f45a25439297436d305d523222675b. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/INR322100349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d74f76b0d6be0e97ff424d3e8a682bf6406076c93dda00925946a9d2e0b2a7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/INR322100160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0b4244c37d35ea5d534213d2a096b527e0ea2690d131cb65e371778fccea63. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/INR322000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb56e4f215f4eaebf9a1234b0a33c22d41d8a9a039c46e8ac0a712634e711bc. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/INR322000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91135c9e7498cbaadd3722f934f8f11908927811bfe4e3db37bc539cc470e586. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/INR322000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f859080cb0b7bd33995de31b793df45705f522547ea2722219e7ca7c89ccbf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/INR322000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e7df79651f8eda247a2e8ec4d486aa75744ce7d449862202b73268d5f0dd6e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/INR321900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf166f2e2bb1071a2c486e5cf6f58c04db8130171ed37a6bcf6070b32eadcdf93. 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/INR321900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fefd2217734004ce9e5295a4690bd3fca64af8a6a4bf7eed8324795bed033fa. 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/INR321900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa959517da0c60533d94648e5f0453a7db4215bb1d7e02b89be3e0890fc4ded. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/INR321900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f24db75bcfe7e8455a8c212c665feb95ed6819b2db16c1a0f582b1b6776c92. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/INR321900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8f8a6f45cfa3c5b733e9b5e5068f7c9363deb9747ed20ddc5537b2276116e3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/INR321700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe912da1e4fe2004d6fa5290a53a7240b269832d1ad7693db7f18164afb963e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/INR321700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224875011aa1b3be53d49c006aa0a36fee0cb26d1948da3563f8ea4f7b3f359d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/INR321500091.