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 0x88af5cfa65eb14ed149f2aea703d92cfa414748117c267f77ae343afca6c616c. 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/56a1fd1e-4142-41a3-b841-91a3449898cd.json and https://artists.proofprofile.net/proofs/artist/56a1fd1e-4142-41a3-b841-91a3449898cd.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 0xc2b78e276c15845e3b2ef17202cd61659fea5f11cfd64fe43914dc6db6a909d4. 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/QZNJV2039858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2670db07cb7369acfc9b8fe89e9cf4804cf64e613dd8333180e4f510fb5a2e95. 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/QZHZ52047891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe80f0f84048dcb574ae686368918de0ca571938cfcc38cea251bd49550ed9ee. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:58:55Z), 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/QZHZ62037626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf563a50bc9907fdb46951b5d940df7e43bdd2386996aa0f0740c961f517d1755. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZNJV2080619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5626eb82e24b64ccd7634af7d1e643ebd2025578f3503001ae11a2465923131d. 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/QZNJW2007181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9009f575aea40558a7499265743b575ba7a389cbcdd779dbc5b87aae3358af9b. 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/QZNJW2019197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed7d20d52cea47a0adb3c818e0d951043079994c50e5f955872c57d134ff853. 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/QZNJW2097906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cb702c020d6113f7671ee5e0ad455ddd8df63e60d9e7849639a5efaf5155ae. 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/QZNJW2097908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe222e1bd4a901a9a5688c71a406e1673188bb005fe484c080f373f919d831986. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZNJW2097909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5baba2a6b61f0f0a43e2152fafdac493b5bbd4dc1c21cbbdd2254ce5cf118d. 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/QZGLM2188896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7f8cd2639be11ece6ae33dc9c3c1b70d8a60063fc8ba8143baff02d8777f28. 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/BCDOB2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc6a0cfd4dece82e1133c1a45127d7e6877dfe62389516b98babdf1559a970c. 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/BCDOB2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707d6f1126dbbbfb76dbb2f1d39bddd665baad77a9237270bfad5e23df572de1. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:52:12Z), 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/BXQHQ2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3da2b70d70e764d1c179c97e7c0f66c81e04e362c4284d69bb21ad652103108. 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/BXQHQ2100171.
As Paredes Tem Ouvidos (Freestyle Aldeia Cast)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858293142f7ee9c30ae92f9477efd1693a0b1121b88220c4d5b87a8ab3e18537. 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/BXQHQ2100172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3869db856f0a7a93179265c4e11eddb988bc4cb627b8fc8038d54f4bcd97aa59. 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/BXJK02200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96832626b78545adbe810b6740ff7ec09f48dc19b573c4ff8f085b84e6632ab. 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/BC6GH2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641a291a661b5b57a3cd97e099244ca1bfcf618fd78331c9113ba248cd4da3fe. 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/BCWA32200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c8a6f8c71d11cb343738ba399fb927f9d2f257fe3da5b6691d8af67317f0b6. 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/BXJK02200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e4ee2db486953fb89ee6129e8fe53dc528bba9af891718d2f6d561306bff33. 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/BXJK02200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f489d837ac4433af45b6e5ce84d80c96b542baee0fda5bd6b39d2921d77218. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXJK02200129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4b9e2cc6731e3b511c81137930b4a9a720c9585a16d89b1806e859648c919e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXJK02300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec57308e0d5fc8d933c4352690b6a216b67b47708b5734548aeec56136a80633. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXJK02300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcd7fd2b79fb156359db2624460dcaa10feee53c743a68b7274da5e9e924ea9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXJK02400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fee8a8a433feff2df3fda1e7f2024e915265233d916898703dda58ca6214804. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXJK02400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4838b2e7d29ef527c23611fdcc047f2e82a5eca0cc63cab9a3bb93264b90b467. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXJK02400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c787e79c5ebb0bf04cae01290ba93d12d5599f703e5a86baba437024b0e0f94. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXJK02400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46c4af6c3d23cd29fc1a532f40105bd55f76b879614c79feb542bb946526632. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXJK02400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4f79d3d37a8d437b4ec7303b0cdd13f65363757032f0e8fe126cb4c28b8d40. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXJK02400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cc2cbc2f986a903831eb27258a36f4bd6e37f0d5a9cc953ee1d0cd4f5c93ce. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXJK02400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbfccf9e81071613eb3c3d736f3cd465a2073315b2cbe3a6076111d3e5ad836. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXJK02400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af5f592c668bbca43d96f0c9d57a2a63f81657015f17b74184de413883a3469. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXJK02400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc982ecb0a6c5bace334992f1c17fd5e82a33f63cf8726c80ae23e1e24099fa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXJK02400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa415c85f9a632edecae7fd4fc777655a14366a7f2f67eb43ab722e72f3761de. 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/BXJK02400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fa4490c8ee60f0b8eb1abab20cb3123d45acd019a01f9e72ba3cb1f44a63c9. 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/BXJK02500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba240201ab6236a2df94f3694e90341f4b44bbf255b434cf756049c58ee096fb. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/BXJK02500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82e9c7bc23ab9cbd47b7c4c4cd633b75cb347387bef4f5f66ccd27bf86d0c75. 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/QZW9M2207560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8685845c1efe9353dd6c2ed1668a4b549c10262b637f97c62d5fd448fe713d41. 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/QZWDD2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf400aae02a5e976ecbfa9efb816853eed99b30d6ef84b5fe8b008885566be49. 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/BXZIU2400001.