Halldor Mar is an Icelandic songwriter and guitarist. His music is based on acoustic folk music and alternative rock. He is also a member of the composing pop rock group Wiggum. Biography Halldór
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 0x8592d79c5ffdd7d75b7ce850a7ac05cdebe0b75eb469728f6419197692aa3b33. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6216a5a9-8ce5-465f-a7d9-e7a999dacf87.json and https://artists.proofprofile.net/proofs/artist/6216a5a9-8ce5-465f-a7d9-e7a999dacf87.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Beautiful Lola (Estrella Damm Cesc Version)
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 0x225b2784194da148721171ceed0bdcf9889241082b3d083e1dc3f3746eb71d89. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/ES6101422906.
Stranger in My Own Town (BSO El Foraster, 2015)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea846b2965b980be3103bcb6cbc4c8983dcb58c5e4e932c9e60059be438a60d. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/ES73I1400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c9ef47d7be79802f5e0110ec21e3195ad2568c7922a3f7f6123143fda74d9f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES6091800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf034c47b7d244592fc6065b83f7b666220ae26ee3df0c8fc0e6a4682c2f7b598. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/ES81G2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c5b4b271349458bf2004684b0d485f2d51d54bda0f3cc5f1a779735d2bbeb3. 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/ES81G2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f02fe246e1b943dec9cbf7f4af18dd4e78b3376325fb5ce868748d54d70b40. 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/ES81G2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a5253f4f44315bd0bb651a81d09c300e480f5d7594946e488e57b848c240b2. 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/ES81G2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf034c47b7d244592fc6065b83f7b666220ae26ee3df0c8fc0e6a4682c2f7b598. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES81G2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5017214f9e157eefb595aafefe7e54b5c3850aa01b441b8c6bf123d21791da82. 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/ES81G2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344440ac6b1b9141289ddef3115ac4f4fe6e93ba102a5c60a70864d870dc284b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ES81G2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c5b4b271349458bf2004684b0d485f2d51d54bda0f3cc5f1a779735d2bbeb3. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/ES81G2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dc63116ee1ca5524b18b8f88ac6cc5133f8dca8fe893dc216399286299b9e6. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/ES81G2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a938494020fd8f315fa36bae961f414522fb6f56aabc24bf63717df1ff33aa. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ES81G2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6aecf9f2fbb74e3c123dbcbb9552a3f94a01069c2c2a7e6e35835f5832e64b. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/ES81G2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459211e2a9b109e70a156310d097da48030a2dc70f127464e92f55151497407e. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/ES81G2500012.