thumb|Milladoiro in Pontevedra, 2014 Milladoiro (English: "cairn") is a traditional Celtic-Galician music group that records and performs music with roots in Galicia, Spain. Members of the group have
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 0xe331dda3e3211c19177ab738aa9031b17e675346f40b8ee5a4b81d367ce0b11f. 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/41e6b953-304a-44e5-a381-c9f4f560a1c3.json and https://artists.proofprofile.net/proofs/artist/41e6b953-304a-44e5-a381-c9f4f560a1c3.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 0x1e5a5ad1043ec7e7c62100fc4c149fd61c4f19a0c37accc8b14d3b0ca8a4ab3a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/ES5240300199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96be6935d08356a56d09a6e16bf6ef596da1df5c8944ce7e31d83a95879c669. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/ES5240300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544dd198fda9ba23d914999ce230ae1ff7cde18a8b237cc205027e220e91b153. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/ES5240300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2d154c14b40aa70a44afc5a67d69657ba3fd22c4937f34f45e36dd852a6eaa. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ES5240300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaddbe888dac95deb14008b98d0d3be35dbc54553d28d0e3e7594de240b8ab2f. 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/ES5240300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74980554fb47f2866aac973d0f9a8e8c99e1ee647fd764adf7b21155f398f08b. 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/ES5240300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44c419919f466b93c5b52366f65aaab9229f2dba58ab406dbee7ae48ce585f2. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/ES5118201620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29b6d13602736c1330c87a6991675126f1a795e2466c3c63edc0c8c9a518ccb. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ES5118600374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda534cc5838633bede9793d0499719eb14edef912f356e32edbdb6d365d0049. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ES5118600404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02375999dece2fa877df3d08296b0bc886139380b7138f9a0d88b7e1ff06faa6. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ES5301354710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fa890d1cef1a242823022ac33e1520cd30b1106ee314eced5f7cd90ef25ec1. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ES5301354713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef9b3a0147f195a4c53f27755653135ad49c489a0c641530884ea78e4428faf. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/ES5301354719.
Música Para A Exposición Gallaecia Fulget
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161559c168f4fb0f95649c58fca7b3c160932a8980702cbfff1ef31facb57dcf. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/ES5118201623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722f56385d3c50d31b0377baeaa88fb27a5c6784d69ef63f92251a4cff7941bf. 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/ES5118201634.
No Confín dos Verdes Castros - Cabana de Bergantiños (A Harmonía da Costa da Morte)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4ee2df01866bab31153ca35f0bf046e5ca3b7eaadcb0f8fd3b1da89faf6a86. 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/ES5309801002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cca5d9cd9c16519f6dcaf26c1f0282265ce8a7f80a20e572561a08faf1fa180. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/ES5309801007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52540d8bbb49a022034280eacd95eaeae27d7ae664061c8e5f1142b576096e33. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ES5300510535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c57938e7e5e649803209abc78195a33c510c82eaae8ce3cdce568acc6e4742. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/ES5300510542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fece654dfdb5c23807f375bfc3079ba94f6e8f1beccf886b8153a9c5b0dc36. 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/ES5301662953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e901fc98bd82e165b90b99b063cd55ec99fff81f2494c8b344917b5eea29dae. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ES5301867467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532cd7959a65943dc03f28217f72d3809d8af82c980878b5e9f4bd170c03e2ef. 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/ES6089680301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0bad4e76d0f35cc827d7d23d07e641b7cbe8d502e9467eba7684661907e467. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/IEABE9233001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b5b8371bc2f7b09f374d4db9ebc6aa0c4e6e8e544d9df575de5055b010294d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/IEABE9233002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb662055e743616fda763bd7b2b97da94a1898881c97f677572bd640b68b4d8b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/IEABE9233003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccfbf47b3975baad23ff48dcd3a52c51a7e3b3096b99ea814ddb9a2141123dd. 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/IEABE9233004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf6061f9e897d52da7c955ec6d1208c337c6dcdb6102f7088c62c5e5cd77a67. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/IEABE9233005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae80a1680e7a4358a2a1f3acc80e7a4bcd5564a3b3f3ea87f14789997dfd482. 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/IEABE9233006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2f2e64cb8339e2139c401587a6bf6547fa5807add6c403581e0235cdc9de94. 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/IEABE9233007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9dd2a5d5507a03db7fb30bdb2aa2ef030034d818afa48a94b73424eb7d52aa. 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/IEABE9233008.