Maria Hein Puig (born 2 October 2003) is a Spanish singer, songwriter, and producer releasing music in Catalan language. She has released two studio albums, Continent i Contingut (2021) and Tot allò q
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 0x32f4d000f41708ad7791f239d6bbe53c58b725c39f53797a1020ee174e91a366. 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/5ac2057c-5680-4442-9f76-cec0274a8f8c.json and https://artists.proofprofile.net/proofs/artist/5ac2057c-5680-4442-9f76-cec0274a8f8c.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 0xe577b5810dd0b94117b4d84af71ca57b3249ca7d81cb5036d4681bb25fd0c3ea. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:28:39Z), 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/ES97D2109202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2c76eb6506ad2270291a3b7761857b4a6ce6377803856381f21e236ac8dd6e. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/ES97D2109204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02670447778cbc1a63d54f9dda6ad7355bb5dfebb235728eea73d54c405fe661. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ES97D2109206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffd0ff1e560548cbf102ab7f18f29cbfffd1709626ca645fca3cf412fe80215. 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/ES97D2109208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e42cd01d4b8ac08283e81e51ad7e21312fe4edff3959b7ded1a7e8d2d96f00. 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/ES97D2109201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb291d62f90b515da1c0e6427f00ae8e08a7e246da8ce65dc07cc1b3db4e4d4. 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/ES97D2311208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4d3a72ad3720a9d4e67acfc199379137e70f0fe226237287066380b9bacdc2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ES97D2311201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31118e6317229530176c271e000d6cabd532abca1d7df0f49faad40c7099a739. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:59:18Z), 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/ES97D2311202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc94d90895512dbec677ede2dbbdeca8b716e6c93e0d5a39d83c71327cf9c746. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES97D2311203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6f61a4169d99a5b44c4082731aef2e21b285c464762689d5df20550c404c15. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ES97D2311204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0352992e6ea2c2c1d155b7529880742f4203dabd0254ba9fa49149f2f35fbaa. 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/ES97D2311205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31a97f2b2a3457140e484480b57f006ae05c6300742ff3126a6be52e263ffd5. 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/ES97D2311206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422d9f30479064816d23a58b86537092f2466f0010477aefcf527467c7acb5d6. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:18:47Z), 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/ES97D2311209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d7b459f594f5fbd9e28a1fcc38b4e2b346e98467f44bb66a405257b25a8c7c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM4TW2496369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d82ec433f875bc3337b0495c7a99e69aa5bdd6f126ca093903d69afde74891. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM4TX2480477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a604d726daacde453e54ad745650460dbeb10291de87e0b579de93286968693. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QM6N22473069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccabf736674e47844070e26a3f9c426736c0d74b82a08ea0afc739518bc5ff78. 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/QM4TW2389179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b5eca246b93a6dd9b000372e29b519b9f0878a0da644e3fd73e5a68333c0ed. 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/ES71G2401392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a533984dc886fc1b881a65859d81996ab6b5b51f0798b210a36f6e9d40b522. 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/ES97D2110002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3630e5ba938899a9d677300fa5c4c50b3c573d028bddd61664aac2c7034e354b. 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/ES97D2110009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338c5693836014de1531670266c6c59aecc248102ead8d0074d96dc9eacca880. 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/ES84D2300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca13e6e282fdaa244e2199a98c35c6aa35232faa5ce22debee9152edaf324e97. 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/ES5062411406.