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 0xbb0fdf2db687f11904423048e9dd2f41aff2fefbb80a7adefd3c0e75f87680eb. 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/07ad4c2b-3ba6-4a98-ae2d-072127d58719.json and https://artists.proofprofile.net/proofs/artist/07ad4c2b-3ba6-4a98-ae2d-072127d58719.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 0xfd9f9e9f14b4f9667c422bba3d8539063c1dc2e0c1187cd3494ed82fbfe63176. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCADE1752719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4291ea1e6a9f8b2f1435d4153ceb54ee4ff96637bcb8a510f4c92a0bf0ae97. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/TCADH1775769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a284063853aa4456284eceecfa7dddaaba73a3ade852807d2677c8e179d9b34. 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/TCADR1852939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddf8b700419a45ae8fb19e92f8453289f230716788533442d8cf71b204f70bf. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCADR1852949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fb92e845a575cd6c0d8051860895d4585448d1af60be7f272cd2c6c9fb0583. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAEH1912311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05c9f9f518a9ec820ff442bc1f93e2dcdfb6b80ae3076fa39ee6017e7c3d1c3. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAEH1912314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2c508026933391363f0fef75aac624e76b073970283cfc44c2edb7b8566495. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAEH1912315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53315819e139de6e2c42aa206f5623e73ec503092df35bac684869720b8a11cf. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/TCAEH1912319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc921a90dca63ae49205db195ba2af128a3c38257dcf7e45dcd2708d11db97d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAEH1912329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df5a727b2993f1114297b8c45b8adc8d2c369989d3df501601f0790faffbb77. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEQ2042061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc5fa9d85c9bc6d3a1c16cadf51f4f2c257691eb4173430c0c5e00e13246662. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAES2022604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a667a053704f924e9e82566ded59d9281e5dc26c3351153f298eb1181bdf57. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEU2038800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418f1d15f11f425405b79826227680e36e4fd927bc6604ff1cfe4d7c36f9e777. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZL382084665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe764a9fba0e741c57a58041f123f55853634e1771b1187ebfba3be8682ae96e. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/QZMWW2009103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4341426dcb0d8f559ff981d7c0432fc76090af2404e6dece58f6b711729254c4. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAFB2068108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe473b69a969b16410cea738b9c9bded40ebd8b03e73c519426d0f3a2bf90c778. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAFE2040727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adb5d1352d7195cf77df59d28da3614a3c5c616a612b45d0e5c4ef9fbf4aa1a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZNWR2102173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eacbe0cb5d418c44a9e1a28e1af0d2f78aef61bc4e3acd73043254be8ff2bd2. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZTRX2204470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a7aa5b80e3f768918f56843432c806f6f29e36b21ba0aeada11d6fc58bcc41. 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/GBWUL2214827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04272207d63c22b21f35638ba5a9e94e26e5b3b9e4ad4a7cdd449a2772b03619. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTRX2207818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd416ebf64ef5b156c96d2b20087d055ad39736bef0f5d90b876daad7d0604812. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZTRX2208089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ab307bffcf857d1e6172503f3f831191e0797a7e102dbf25abf3961c4e7d18. 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/TCAGD2262153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e98a56bf8291e65a429437b2365f04a4b432b4ed49132cc1e1d08a45fa6739. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZZ8B2455394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f55eeac26d36d7d1ff2b77343e76bf574d9363310227a94484d2b66c72ca221. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZZEC2416151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364f9a63fa0dad5a7a3991f74a4989fbceb1fddf4a21f40755ee383cbfba7388. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBRKQ2572616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f55eeac26d36d7d1ff2b77343e76bf574d9363310227a94484d2b66c72ca221. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZEC2416151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237b9d57246a69a4536fbb4bfe11eab93e1837432e2ba0a6a9f04a787c0dda39. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWDE2508181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364f9a63fa0dad5a7a3991f74a4989fbceb1fddf4a21f40755ee383cbfba7388. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/GBRKQ2572616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dec292f2aae08f4d1145f598e9952f5ccc7eea5e046f843bbb84a0f462b60c5. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZ5FN2549729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb7f5770c394490d430fb69e56e8d7bf9a1c6474ee72132fe329b57d727495e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZWDD2598682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696ce2a9fe121967ee91cbde688c95c02ecc1e9c0a64b1a1019a17e08a791480. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZTRX2565975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fa17c3bd1fe02855adc2eb8c655df5c58ed92f600d0d50e1fb28560a5dc915. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWDE2508226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a205090d4b6dc05c541384f025622e829a9c3915cb4055e0f2b1c94d2666c9. 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/QZWDE2508229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6424be00618e10a73fc3d0efceb9386002cfc1daa6b98d274ec7d808742c39. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWDE2508230.