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 0x3519c8983c63ef1fd65ca0412e80a2e866569c473172639d457c792aa8da7d70. 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/5dcd210e-b9c2-41d9-a5bc-84f1fee967ca.json and https://artists.proofprofile.net/proofs/artist/5dcd210e-b9c2-41d9-a5bc-84f1fee967ca.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 0x6dd90397a388dea2030df4f6deab69e703226cb82b56255c521088a43647f4cf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/UST8K1631142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e58397c1752054eaaaced159ce279ce7819a0b740f981134bf44346a47c6b79. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USJ3V1277257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e53c277f9c2022233fa3faeb0f04dd871c98243b56a34d19f787b7603cd7a5. 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/USJ3V1466437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296da7704163ca93422ca3ec09ddbb8899f65c26be3e0eb1735c3019b3961977. 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/USJ3V1466446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa719cf0b085a63a5efbe70bb3c918ffcbe0ca5deb55c801929417e385569371a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USJ3V1466431.
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 0xebda5dc22fefd0512dcf9b874d8f54c0280b8bb1b540b19157ee19ca4f219f17. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USJ3V1466432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a1053888367af01770c42061c5fc6cef00b0bdda9aa9a2db9b0c352340072c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USJ3V1466434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd574c66d5d1c03d135de32eac9e1ad2534ae46ff258305c549d394617b347382. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USJ3V1466444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f2e47740c1478a2b03c690e36c61c5f50a4829899ea724d50a4a44832c326b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USJ3V1466445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903c23438bbe26a82a12b4a2f7fd936c1dc339c07947f1b1356d25c83d5f3bea. 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/USJ3V2316909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917749614ca339ed019d09ecef6aae2e2845f98fb275ee8ded44e095c0687044. 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/USJ3V2316911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba2e6050c9bc1ded7feb05fd1c0690de4a26fc51ceb83b19daea150961d41eb. 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/USJ3V2316914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed478092f60f728976cb7fdf7d614db343eae671b51d5014f847ac319b0321ce. 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/USJ3V2316915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb123517459478fdec61b9c64bb795c9c1145c857fe855abc67dd095490afa5f6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USJ3V2316916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23260d6541a3845bb84a9c6bc3fc74c6fb836c58dd8fa39a8f43150e8d372186. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USJ3V2316917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa77f7ed36e26c895389e7d25a4892809bf0c1cd39c9c9d8f92e73f4c8302cb7. 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/USJ3V2316919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed0d521c5a143686505cf6b51b85ca3c337c684a7403e2f113f2b7f9d42ae9b. 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/USJ3V2316924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc93d85f55bb8a5b10b3e693b9ec1b33ec16c3ca44b71e1732112c7cb60bdb35. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USJ3V2316907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21924d0e466d9cc7d34db4f008d579c3305c83dce1830e1d863f8f1616b14425. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USJ3V2316908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e296328c1cc57ab2720cde7530b8256afc91bb2a89023c796119b895b75241. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/USJ3V2316910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab7b314dee025275109d87708e5b19f161d716fa4383c5529e4ab0620ef142c. 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/USJ3V2316912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927b754a395a33c3ba8e281e6fe74a1d103dc64cd86318c0f38110479f389d50. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USJ3V2316913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338a6f84d4e450d660378b7b992fcbbed9d7a2197c6bd10e9991e78f70419d92. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USJ3V2316918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb099e24979c9863d9467b28a2b1b5e5bf1e6ece0ed42f11168f6b3ddf1fa866f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USJ3V2316920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a91501234e97810ad39d6cca11dcb11070dbe714668698fe3ff492a0525a5f9. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USJ3V2316921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d4593550cf5c7c29dbc9534314be1cdc4fd3a2d90af6fabf2f0d9529cbaefd. 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/USJ3V2316922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b5049fc219a02f3ad6c8914fc804b2eb7c8e8937ccb528a2bab80c19b039f8. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USJ3V2316923.