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 0xbe9653985c4617cd35cf42c62f5ec1f97ede35267bdb6ee58230ea7d7716d9f6. 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/c607b8e7-ec6e-49ad-8f2b-1dd3873c6037.json and https://artists.proofprofile.net/proofs/artist/c607b8e7-ec6e-49ad-8f2b-1dd3873c6037.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 0x0adb7931f07ea1662e891df720edcc4a8e37d8b4fe20aeb3d2ac6da7ba7725fb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM90660049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627ac0a77dccedcc71eafb6bca23627010ab9d4d76d0a812992db0e2e3973ce2. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/USHM90660050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b30dd44fbf204baa4a028387c8eaee9b08f3c7f5aa5322770950c6546bc464. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USHM90660051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0f451a67ea0984ba43a7f46f1446de2f47ac8a4795bef6a7b5f8514d28db99. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USHM90660052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe353d4dcf2ad4c53ceeefa337838ae92448ae2c243857d042ff27f49fc60430. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USHM90660054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd878f417b9a2625a85ad34ea97115abe56747b12f49034edd5554ead0e288f15. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USHM90660055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7af08b9ff4d32962ba97837879b6d28e678237514bfe290a1b796c0e4a793ba. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/USHM90660056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44994322905746e9dccfa978c25e360e5e93f3cee893c7ed4b638265e364d2e5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM90660059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64520e37f2cc4ee0cdce73a383e66e32c59234718b6751b189d0ae54f2b6f07. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USCGJ0709566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad0f93d5504dc36dce4d79e594827b9f28a20a73a2c9b5b92968b48976b64ac. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGJ0709567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492d50eb0fac6cdfad4a7693a5f2d85afa224d1a4416ba02e986919b771a676e. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/USCGJ0709568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27af1cb694be4deaa82461f5ce53191b5c31926059dcc5594e5c725feade8fec. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USCGJ0709569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca077068a196f699698fe6945afee4203b7521973082c0b7da35dae94015320. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/USCGJ0709570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0306e7317ab3381e83b384fe2b403b8470a411efe7b513aaacb572ff79e2d574. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USCGJ0709571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e819fe7657c5d8d484cba9499429add44b086785323ca0771c49782b8fe364a. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USCGJ0709573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1a676caa77e63fffad5bca1726b2b208870522a7e6edde7e9301db81da3bf6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM80920525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe97326194400418887ea310d5b4f148b97d5374d1c0e8aee9aa6ac60dbb5c0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USHM80920528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba93b8bfb5c2385710833e3288c0b775a32e32f8fe719040f4a163d3eff427c. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USHM21445634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1fd6ca67bf90d9a2e6b97128767bea6991d27306afeac782c6d222f203f649. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/USHM21445636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dbc2403a34070da763b3de5fe1d33d1c53860b9cd3c0489b1bc6bfc18ede2a. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/USHM21445637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc37329584147a7a20faf423bd5dd300753540e54061ee800b41a2cd94e99992. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM21445638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a8703ef7e6230d6408883151133273a5389ef6677910bc6ce3b2d46d82a1ac. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USHM21445639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547e4a1531903662229582865e242f2db68c8bca275cb447c71325f58ac369b0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM21445641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb8015633b16ebe549ed48d8ced86dafe3abbc34a4c1875050c3c6f429ecabd. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/USHM21445642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d087e8e6313b35ccfb97d5fe2d3f02d9b88129e6bbfb0eacaa44f8e0a1bc47. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM21445643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c19fd522b3554e0870102f780a7d32f3ca388fabeb03a744e587c96efaa63d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM9AA1656876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce50a0c47ccc1e5869236181f0c4f622334ff9444ffa17cd4b911ce0dfe2731. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM9AA1656877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf013f698fa8f8c20ec65398cd1d580804ee190e55afa68519a0d63446c6efd3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM9AA1656878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a47a13cba32b34cc2db96b609052a84584a192fa0a9fc97e91ffe0b48f8db3. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM9AA1656879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab047f89238286f72603790a0ce09b045dcda9416732b4ed643af1cd70d9287. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QM9AA1656880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba45149398977416fbd115896a3917713ad7636345beea6b0e5a22b999cf480. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QM9AA1656881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a518807544c80c62b7335805a5c63ad62e8752a359eb7f413db75f4c1f296c. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QM9AA1656883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2357b2aa66b4d5aeae42014f63c51bef4ef3e5afcbc18e2d14d7f0ffcbcfcd4a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QM9AA1656885.