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 0xe6b1861d72572302e71ed174d28b43ecb1878429a3f0d99fcdc0487c4ca98576. 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/5ec72b3f-8ebc-4c05-800b-166688789f12.json and https://artists.proofprofile.net/proofs/artist/5ec72b3f-8ebc-4c05-800b-166688789f12.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 0x12d1298310ac22ac79f53b431e867782fb67b9a70b61c935ecbfa236ea9a9c50. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZK6F2424171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa034a986d730a776dc62e327a4d863da18340fa48cdce2e72176b203862ab73f. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZHNA2460927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdede56efe1a875cf8ae31507863a1764320f072ad912029751fecb4f4f244f9. 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/QZHNA2460928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f747a779883e196b378030c163f516e0418bc72cf73396a9dca7918d5ed163. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZHNA2460929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb978b578905e5ea765f47ea90a61cad8e851a4829392c328829cc5fbafd0590. 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/QZHNA2460930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a2cb6f6db391a912feb384f11d50331c9f74e4384fdc38e178cc79a4cf8163. 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/QZHNA2460931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1493cc1b5f01621fcd420b958f2d7d68dcc38438416153e155ca628a209921. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHNA2460932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d449420721c12ce6e32ec4578e6be342f3f3cc65fd10b291a1a28c284ca4d1. 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/QZHNA2460934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dbe1d7ae8fed8cc83627e9d83d6fe549f14894da8d72186d4c1a8bd55e1ca9. 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/QZHNA2460935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff4b9e2122fe3752a0e5f9f5f317a5596e2d41525847daf65633ee615c7e094. 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/QZHNA2460936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e65bef9b10efdac1ab61c2718a920cf60697a5a11e1a65328a9021d8864fd42. 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/QZHNA2460937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c00e634e29b9a9ca61b86d5a82a389a781a5172761c1c9f4d47901e7b104de. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZHNA2460938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01c7df8c507c4f38eac67e1c0ab8d8c1ce8965f12d05a880c9bc061e907a8d1. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZHNA2460939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc088cd00c82899269066fa86a5146c3e2aa58a68bfafbddcdebe9353bddb1a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZHNA2460940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8280ec833a2738c64704a30610d063d31ef2793b5c8d00a1d7765726e4fcad9. 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/QZHN52472797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea1027c5fe2f1fb48afdec24117ae03abf44a99cb906327d6d1b0bf9c4dbabe. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZHN52472802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004956070cbffaf6f0d6fd113978702dc8d92ed154be279fb602fd89bba31364. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN52472803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1babefecd85a44d80603950c5cea92b5ab0f3328af5d97e7091db9557eb4e2. 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/QZHN52472804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e6c74f8a06ca9ffcae51751fc7b058d5b6097e0cd93c9d17299c918f3e0650. 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/QZHN52472805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd458be94242e1b2c5044a83cf3c7cf00e5783c3c90834fbccd0c70c4ae4a8392. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZHN52472807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f3351e9b71156e5de258afc186cfa0801b2904c2088d72c5211ea109ccb172. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZHN52472808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf946e227f87de582fec2b426c60e369c5508150ad5c221ab886013603ed67092. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QZWFS2486840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b3183d95c8107824235c0b3e1e653da9abd7f82c7401bb9ded260ccf4c9c47. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZWFS2486846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47630acd1f7cfdd27a6d6378238ec17536fb00c287b46cdd81314885ac49e8d5. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZWFS2486847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae7bfe792623d81533ec262290b9d0ee6bbfa94fa6c46364c7ea05e79d60e89. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZK6M2459162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d6df1f0d40705328ffa52e3dd686b3b6cdbfdc97b8c808339bab22f9b51a88. 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/QZK6M2459163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402ece1fb8c4ee39186bfcd93117d25c1bd6a31b1fcae19614f99ae6b7da4503. 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/QZK6M2459164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c57ebd0065fb4374f5e88c3a92929e411182a6c0de89750ff56d08b15e7f82. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6M2459165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e01c8de920b67c6a9a400e38a749e68b9adbdf02e4cdefb2895afee242dcce. 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/QZK6M2459167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fae30dda1b3d7996291fe47215079347b298ad44fab7da7b276d9208f822f14. 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/QZK6M2459169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8f0611b8dc3ef75d950755457e9abba11d270228960b5221cd11b3d00b4e59. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6M2459170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5bb5cb8b8a388e51762bf3bc5133b7ec94bbb04349a4bace8706e3fa86c32a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZK6M2459172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6622c3f67debd4ecc9333d3dd0017b8fdf871dc54135c00b24912cfad1919d8c. 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/QZK6M2459174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a41b6a0cb3111a95a2271e328df3b0dd9770f29357f7e7e7b4f107aacefd62. 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/QZWFN2386058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc898b363f565899a9edbbdec5e1d82b79f543c92509b20c04d75a24c7f7cc09. 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/QZWFN2386061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496955db55c7360824a749b3689f02bcd99fe0129fdaceede498c0f9f7c8fe33. 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/QZHN62416827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6da699a397f0b46b4659ee8d5f8e70436364f0e9eef0f2e7a85fc1a4cc78ce. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZHN62416832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674b752bf679dc2023faf1f11121077ec0c8e2a955711497f26c38174e37fefa. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZHN52469687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc5d1699b0da2b8ffc2ebf15a2597d04fdaa052dd935353a65637291b1d926a. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZWFP2484240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b3512e5c5f121a4712eafb5946741e980736bb56c537e63814a3f1d59ff337. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6MZ2531802.