Leyla Sarah McCalla Heart of Gold Work ID No. 886049205 Leyla Sarah McCalla IPI No. 715028763 (born October 3, 1985) is an American classical and folk musician. She was a cellist with the Grammy Award
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe71216662722f7b86280ca67e969ffd58cc005e264710c8b7ce17b4f98aef4. 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/15f2a28b-b8dd-4da0-8b67-b3918b839ac7.json and https://artists.proofprofile.net/proofs/artist/15f2a28b-b8dd-4da0-8b67-b3918b839ac7.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b79bd1baa6329753a6d9ffaf07457cff200d6c9dd55728c952f5c535850b9d. 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/USSF12024108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d3041d04993ab5df3346fb177d7cd9a67c8a12570066564e5c74ae7a03ceb6. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:32:20Z), 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/FRE261302340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e47a21c765f83abd205677b0b9d1fe82ad0c84dfd22b106254b4988adf4d9c. 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/FRE261302350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4018c435b07ac8061bd7061df97345a28692a0b8eab8213f68d25725fbddf916. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRE261302380.
Vari-Colored Songs: a Tribute to Langston Hughes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cba0061a490ca12e9a3457b7a62b70c84422a85a5b9912d2def357550d077a2. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/USSF12024103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ce6401390890b1a8eeb2f51a4f2bd65634c6251535b6c0c4941341fd4366cf. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:55:47Z), 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/USSF12024111.
A Day for the Hunter, A Day for the Prey
A day for the hunter, a day for the prey
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824af7d2e4807c61fb1017d3f60c5be60ce3320ee96eb46b477460cd81ef017f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMEU31600712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda856fe054b9c1bd95a4302f0e9bc77f70e136da6f1d43cf47301fdde39b89ad. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QMEU31600714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127262db323f9390ee1b1cf01ec4a05ebeacbf8c7f1b6ff4b75855ebe8376d16. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QMEU31600715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3c7adcb5c4798f85b4ed8e1d6365f4e7a7e5f02dccc23bc114f545614f3105. 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/QMEU31600717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac4df54923f7f6b18e8aab9f68e48e0d13e99c733bfe090331167ee023884a3. 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/QMEU31600718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5dfd1fb6d06b967a054b864f084f4df44d6e875aaeae3ca7b9143175093205. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QMEU31600720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881005b648fc5cf43f65753817c0bfc1d1f17496e45042356aa28967ab8c48b4. 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/QMEU31713679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fe6df4eba821fdef57f4b4a87d9a1edd134e0da6d7aa3ce480fe78093d5cc3. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:37:33Z), 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/QMEU31713680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dde1be51fc6dec3ea781ef7dac3d84e1947ad5da35020c332812377d89d7a3a. 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/QMEU31713681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c21b3aca05fc1cef4cbd9d7c08f0e304f529462144878ee7daa639ba69d7837. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QMEU31713683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c741169c24086c72a68c5163bbc88a134347819b7edf5b71c63c3b1b09f4a4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:56:02Z), 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/USEP42173002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8399e56aa4e0855ddd2535f7b837c7e0ca7d94af16f0afd38343c2e5f6e4ae7. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USEP42173008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cec600652429f535f55adc335a7a41b9ca14c0f65c9a9e4d3bd7924b327af13. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USEP42173009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321e9ced3fabf80be5458437a0fbe9e78ce55538fec0fe45e1573695cc972f79. 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/USEP42321001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca3065ef05f54f8ddbfc9848c1d513d31be903ca7c05665ac858c820ec78b5c. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USEP42321003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f9266af58e897f5f95ba261904092a67b58013f150470d53a73a0530165b0a. 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/USEP42321004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8432bef6a8bf25046bfb4d8b0b711ed4f84bdf38b3673a65b5a209e6ccd12e6. 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/USEP42321005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1f276f1a7d4559809d56620044a7360976c181910c47ae2b3765df273c5613. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USEP42321010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79124cc21e3a22d9446a1581e86f8d586b4f17592a52769d405ace74a1e36fa7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USEP42321011.
Live at the 2025 New Orleans Jazz & Heritage Festival
Music Is My Home: Act 1 (Bonus Track Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde43bddd2aab5958849b881a50e9aab3adcd8ce8557e7f5117a3cc5c2690034. 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/FRZ141520050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a86642809215deae009ce2698f2f34d14bbe18353cc39a1d89375c82afd4b91. 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/QZE2B2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f34d8bcb2a7eb3f02b93ce1d90a0c2a27f574f1a61c29b4532a95677e2e9fd. 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/QMEU31713678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ed5e2a8ee59dc5b952528c0f0849f17d8e9b4a8730767e993f4c525cd5a9ea. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/FRZ141512020.
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 0x18fa4c9b0cd370a289549ad606d47d067212708c9df606d7239b03c56fe18087. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FRZ141520100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22f1ce569558cb481027ae9361efa570af8ccf6098e10efdee51009c6d8ff81. 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/FRZ141520020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1e47931d95f635c46c58c4a97d4bf6df7092f6b39e6e1a913aafabc754d0a1. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZE2B2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ec2b48dad3e20a3047034c9f48ccb6b42850041a9fca2087ee30500681e43c. 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/GB5CD1912210.