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 0x97a4ae508e174fb8af63415f4331dc237e1c2258ad57b4c55eff7f1aa5f80442. 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/d6f9edb9-3298-4241-9161-6d5b80b2bed2.json and https://artists.proofprofile.net/proofs/artist/d6f9edb9-3298-4241-9161-6d5b80b2bed2.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 0x9695d91759c3260c12eb127d1479c84cf3827664b14bff877027511a4cb82f23. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/ES56S1800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca51b7feedefcb0b47b88bb8da8b5ab94995122054262dbc4a8ad9f03524ebfb. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/ES56S1800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988810ca5233af523c011a1c716fa6b5ad07f1b135ab240ada8a5c2a0c260c1a. 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/ES56S1800082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967c8d4ff0093c22d5c0099f8cca01a0b8a80776a73f19b4e8844d3c6642cf08. 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/ES56S1800073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb691ace04a6d0c9fc1eef6a5719968665782e75aa8aa71297005f328396afc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES56S1800074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5094fcf9c472460dbb21bc5721bf6009cd574f9ac4177f91d27e451fcea762eb. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/ES56S1800081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f6ec940ef78a70732bac387c025fb0bbeb8e2edcbf0d8744e2dc6614de3eb7. 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/GBMA22084690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0480f99615d517f4bcbf5a7452d2fb0ff1787630da998912bc2e808c25d6326f. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GBMA22084692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08adc8e587ddd11787b7b0dadc3ec5f933699f7e039a55fffd0d67bc40d396e5. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/GBMA22084693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c8d06dd6cfa445e2fccf047b4c31390649cab68964fabbcada75acc1afd1be. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/GBMA22084694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22bd6630d09dec96cff16f700b2a79a5a2fae4e68c0d77777b0cb71923d0632. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/GBLFP1949124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715c3d3681c6faf5f884ac799e5c362507f3bc39caacdafd7a269acc3c2bade1. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GBMA22084696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e356e6da07d01a566f0b97ed0b651bedd72ed74697e96922af066ac565a6b3a. 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/GBMA22084697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd255c039cf05924733273cce134cbfa2cdba11e27072288d54ef40ae8fb010. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USA2P2116684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd255c039cf05924733273cce134cbfa2cdba11e27072288d54ef40ae8fb010. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USA2P2116684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f9155d400c8160014a840aca2093028ad5fe8612492f1749f61300fa04a5b3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P2121186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c43f31536665b8c7620528da793295ae20116f82f5ab6d0e658754c3bb6be09. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/USA2P2139505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605820020f0501684ca3a4746138a7a17e5e8b4484e533b762816f611ebcf82c. 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/USA2P2343607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377f78202f93b624551f37f61c3fd435cb91ead35b74e98f786ca61992decefe. 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/USA2P2361337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb613da2c823a35d76cc23eb56dfe2da9ad2f0c08c15ffc60c37dc0026bfa8dfe. 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/USA2P2361338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb246846cab347acecd44b38944943ec928dc4a3fa64614521fbe3eacff7e014. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USA2P2361340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3bcaa57afae75c68ffd3afc0d11042f4168c5b16273d5ddb8ccf83147ba758. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USA2P2361341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf147eadec66c590c6cfeb19f97ea9ab38be19db5896952227205483024b05dd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA2P2357992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37edee324978d29e678ef68756c907ebef81c9c75ffa3d92515ca460d1a0650a. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/USA2P2361343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a3162c35d3de8344c389b0ae171415971dff9a922f7e16a54b86ae580ceafb. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/USA2P2361344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d6e9ac65f65a0427850a897a26b18e2deb31332843e5f6c9385779b2cb356e. 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/USA2P2361345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bb4c2bed4ef94c3e5bff4e3b0a087276afd0c5553f5d54721b6e4a9e7599ad. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/USA2P2520768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662578de58a6d6d5879cca15e6148e07f9516cb1f6d79e08aa5b342717255990. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/USA2P2534384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9ba609735e98501df8a4722632b9bb6078fd5fd87c48520481210c8fc3ae39. 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/USA2P2551648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3da75082c27d44cc9032ab7847e58bbaf203ad896c8d4040d227a47c7fefa50. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZTVM2227328.
Cantará la historia - Canción colectiva por Palestina
Cantará la historia (Canción colectiva por Palestina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1498c53f93848719f0205514ccfbdba81f35e319249375b8e8c1dcd7da52ad8e. 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/QM6P42444799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6111a2ddc43d00aac5ddd9cb16a691533899b956fa6798f1ebfec02feecc85e. 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/ES8022200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a013c64570c7d6d41ea9ea1d7ecbc58e5e39025782be0cf8a267a1f57cc2bfb. 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/ES11D1800209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cd30521926adb891b1dc0001ff3957e399f0489e3fa2e4d7c9a7b2ccc0c929. 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/ES62D2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b485536d325e4a0016936b9f73d90cc23971868fae778237efcdbe9fc0d88cc. 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/ES62D2300031.
40 Años, 40 Canciones (Banda Sonora del Libro "40 Años, 40 Canciones")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb277a1c9771e67bf432cec69fe875cfb2c6f95ecdcb191b29a8fc7ec1f84c2e3. 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/ES71G2056486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070722df8d8047d1456cc56d5aaf8850affb0d697c0cdefba69db70d746489ce. 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/ES11D2301016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45b9abfe03b7395680053ca3ca9a3e3d7e30abcdd04b3c8a43ffed0f177e5ec. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ES80A2420822.