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 0x083491753c87df970d3c3101c2a17b3b653abc15d07b6377b08b2b71b9a70a7c. 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/c2483001-7210-427c-ab4c-9298aee5547e.json and https://artists.proofprofile.net/proofs/artist/c2483001-7210-427c-ab4c-9298aee5547e.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 0x8a78a2941212ca186412906e1e2be120f011b837cd548430eec819f021d7d860. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAIG2498534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3408ce1597eabc9c512d0af6343ddd8ac947dd4466e82ea6d30797a6e848973d. 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/TCAIH2498535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7c76aa7b6b4a1fe97d95924059b234cb323b23c3fc0b6d89709002c1d80d8a. 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/TCAIG2498539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cb7ef44c54298f36d546d31ce62291d2a0b5d5ba8f186e525cec983948f484. 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/TCAIG2498541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd4d1b9b7ece7fe65878b9a7e49629aab26a2555b0db3e143c95b7ec61093ae. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAIG2498545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb30a3efd7de7a77cf7479c3fef9dc779b7a079e648e8b43234d12ef031fe1ab. 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/TCAIG2498549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82b03c59918fb6847697d631b88559a8b91e71739ad2bea355fe6103008ef91. 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/TCAIG2498554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adeceacba3e975f04fad9940e14a45482d43c5dbbe7792ffdf55540ba35cf52. 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/TCAIG2498557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d75b5d3402306c392f49fc588595009db84e1abd5ccde0c22fc86445fe74cae. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCAIH2498560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e957c1d17ffc80d2e5c12a88be225d5405450d58ee919273d97e225f3bcc815. 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/TCAIG2498564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e8f52a6e3ecee35a34539b3b55294c1fa64190deedfde16387e97bebb2c802. 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/TCAIG2498566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c38ffa34f41b7c43d1853ed2d7f6e6f09f80a0269e53fda251232e24f448cd. 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/TCAIG2498568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ae56c12c602138e01b4d955884f7755055c2f5b31abcffa0a51928ebe071a8. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAIG2498569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ac582399b9c669bfcc4eb7aa42ebe4b2dbc56486b8b58b7b7a635d11cf6789. 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/TCAIH2498570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7b15785f4f7feddfac5cc5977b49faeb56a32bee194981237735466df86ada. 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/TCAIH2498571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe729db658a4e8a0aeff70a4df23370f183db64dea16f9635620476faa5fe5e2d. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAIG2498574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff46477f553bfef9a62631fe5cc89f20f60734fe32347f1037d4e607cb76cab. 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/TCAIG2498578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308a7fda07a49dc338f727e13feace0edbabf87ef192842835a8457a399b0099. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAIG2498580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1eb172b3960076856618c1ff183895b4fbcf22c277b3ecba53b4f5e3039228. 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/TCAIG2498582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8377cbe0ae65bb539b39e5d2a4661051abdb579d6f30c1c4ed13703c23c9ef3f. 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/TCAIG2498587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139c2c17771c25d4e99cada9f83ec43a1fd758cb69a1faa13c12ce4d9ac060d1. 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/TCAIG2498594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4ffc22db38d959cbc3891d536c27936dc0f31e6843bd39735818b6e440d65e. 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/TCAIG2498598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd34d3b1846daf386de794f14de1f3420e2c0fddc0e7e41d0b9f28335543ec8f. 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/TCAIG2498599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3907dbbda6489962b83095ace78426ce0db237733d4f5120c2eca0ce85a77880. 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/TCAIG2498604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc606a474f984fcf6921e3f57f32627b054ac9013055344580d79db0de3036f6a. 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/TCAIG2498606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed83cd37c72ad4a6bed94ec0e0ab391c15b38e991df20e51a6f92e974c33645. 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/TCAIG2498608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4b77954271b8e2f76ff1a6fc2e0a2b9001c319953147bfdbea006fd47f8377. 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/TCAIG2498611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371c355d223d66c2fc6e552ab8d2a33df2e096d4c09e11ffe2764d91854e0886. 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/TCAIG2498614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb873be9b659334b033d5624fb33c0e09dbf9a02883df551cd83ed691728e8e24. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAIG2498619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8e877e46e5be43b76b4382d01dcb660ec872f95700b74a4b5f72fce32ec9e3. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAIG2498623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf681f5b74c41833798307e24d6bfa8844fca78bcba91202155f20d542a2c930c. 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/TCAIG2498625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf8083036d401716e529a5ffbf01a62bdc0172bf6ac9ec2603629f596ead242. 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/TCAIG2498630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a15bbb143c36bf6ee33b27566259e027b21383fb157f7de0c00aa87fac7ff2. 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/TCAIH2498633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac02b60f25d27e82ff9835f2e5f8e6a0892fa979e5e0f58754c11ff2f4546ca. 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/TCAIG2498708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ee29f8ed1753fa8dcfdf722c4a4092cf313e3f94a18dfbe944100615105f92. 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/TCAIG2498711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d8b6511d19ca9189f8e1fd2ab0a9ff80ce28a0e7ef804e9ae59e0bdbe71416. 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/TCAIG2498717.