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 0xf1ff166b12e0eed4039fa91e0c025f50380e618b06fccdc75eb0b455459030ce. 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/50ee6bd7-253a-48d1-b310-4ec752c07fd4.json and https://artists.proofprofile.net/proofs/artist/50ee6bd7-253a-48d1-b310-4ec752c07fd4.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 0xe022fe85dfabe96f8bbdccc1ef9fc2c36a50d726cf3833bd82989eb971ab950b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAEJ1909234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6d30d54c6498e7cb05e3dfc4ca9cfdea8b0d47fd493236d18d5bcb7e44b9a5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEJ1909246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97334f76accab3da4fe8b5d27e4108acbbd3acbb35602b3c2c1fadcb555b452. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCAEJ1909252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2aeffa4db55221c8b64db58ed47f84c3add37853cc24828a6c3bfa716268187. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEJ1909260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d92cf319802219a4aec5daffaa4161694601722c486f1063f01101448e076ec. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEJ1909264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc1c8c8b523757275fd8b202f3850f7408aa80c6b65a1e4418d53812a58ffae. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEJ1909267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67a9a5c3fb51dd31522e0a6d53c33d966cfe76dc4c8612f0aa873c565d9ac1c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEJ1909273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab98787fa13c639a4d3c1326bbcd325ae877061ef6b09e130f7159c2a2c0a2cd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAEJ1909279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4afd40f12966aa55f4df2284b382804117eb84a851f03aa186991d216d34da. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:03:15Z), 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/TCAEJ1911454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8327bbebdc928c3192cbfad3083ae218996476e42a9567957ba41dedb37bd4ac. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEJ1911462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304592ca90eca85b24f7ce4448b90c2141c4a22b69605e05c88685e3805e6900. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAEJ1911493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb000208b988229e82fdbcd48399b305437faf590dc4cda1fbb32d1662d07ccab. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAEJ1922766.
Maso Presenta La Misión De Los 12, Vol. 3
Maso Presenta La Misión De Los 12, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5796f9e2d157fe517dcba5961e1847b17833d0673571f623785ae96abd24848. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCACX1721838.
Maso Presenta La Mision De Los 12, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3246afe28a84cdc994929458e68ae7c3eebc50505d858fc6208d71c7d0fe11c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCACG1504557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca32ffef870f3621082ec978f6b2454fc06039e00fcc1c1c56947b1070f06117. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAEJ1911687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26a89dc8b064cdaf82fea52fd6b0064d30b655e3f79e2ea4cd88b7fae16990f. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/TCAEJ1920666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdaaf97c40b4570ad07f3b42caebce0eff109efda1405296b8ed4fbcb5e6c1d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAEJ1920674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a4438a33f9f7cb36faf865522171623a8b2634c55f9a6e33f7be79b365d867. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEJ1920681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe399b53ee5e4298d1a6a76844b7c4fa56ffc9bd2bbb73129235bc34cfbf7bb0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEJ1920690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91899ed3187c9ae0081b7b91c0110630bf3987da33ccbf333286773bbfef0092. 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/TCAEJ1920768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07de217c024b89ab2d78e6b2d253655597dae7a77c44e4aa1af3624be7e600ba. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAEJ1920786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23ee18a775df2476357876e6cea871e4036cd89d75c54f01867f64241723c2f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEJ1915072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca1208a53817f632d5270ea658951c8c5eab02aa8ff97ff19e4321e6248b6ef. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEY2000262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdda9c0b9bc2dd43b6dd2e122646563133dfb81b7bd75a4b83a455ec0e26f67. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACO1609907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a5e0911608b16cfa67c0e6f24b1c9d2787120f3573627e726b7aea5c02c481. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACO1609911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2029334de01f73190ef02ce50db0b332487e66888e5cacd5168bd4f06923b3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCACO1609964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99700f7ba272eca06fa7900cc68d079a4c92832d7417e9fc43f0ea3449d897ed. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACO1609965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05319afbab2b32ce2d4eccb305e761d072ecb66d56d58caa16b95aaa9aa4904. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACO1609967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3638df3b823752edd31dfa68c6bc8c5359113d91947fad4fb4e41a40e0a25e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACO1609970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955daeb4469e479b78d3a9c264f3acc9c0177e10eb3b0a249ac0fa08e6ad6505. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACO1609971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9d9f41a0e99b79409f320f8be64cd921e7c7605ebe4eb1e64bd1b5ebaf1b3f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACO1609972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1760f434a79a7c900f314f3606b7a08dd4f4de7585bc6157e4ba8e37ac503aa8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACO1609973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5016926e0336f28264bbacb795d2a71a4dbc5926adfc5f860cad1728f7a1cda. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCACO1609975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd59e4dc8789f4e8fffcc09e3b847007d6f6d249918580bd8045c82b1827f863. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACO1609977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a8090df36e956574168ec6372c3391cb26f3bf2c73a4f7b33f9613e04516f0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCACO1609980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa2014a0ccc427a45f99c3920b9ba286238d543b1678961371ac9eb79de871a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACO1609986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bdb9f0bf316eb5bcd44e30af223caaf485c3234ae8658775fcc0675f0e6e63. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACO1609998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ce374b4ecd7e7908055eb949e145cdd29396594ae457225ee5ecb11c3df262. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMGR32105797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296e2607805f5cd6d2be1fd890bfd996b1c980c2375fe5ba402c1c6a0e26e85a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCAJB2460018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ddf7b02ce48b214528b15f4586f866319836b3fb8ee476d3161fd9839434c8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAFX2124131.