Joanna Brouk (February 20, 1949 – April 28, 2017) was an American electronic composer, author, and playwright who was active in the late 1970s and early 1980s. Early life Brouk grew up in St. Louis
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 0x9df3b387679e6b6947cac4821a013b7198d3628374c6275714babbe9ebff68fe. 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/66db8ff5-3ea9-4e6e-a24c-e8c33237f8a1.json and https://artists.proofprofile.net/proofs/artist/66db8ff5-3ea9-4e6e-a24c-e8c33237f8a1.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 0x604c5acb7f2754328572ca9e71952e0fb8c2419058c9f1f60536cec5af37de4c. 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/USCW61981002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca22ff744faabbbf13541a143bb6727bfffc63e44c597999f9092e0e9e6d3e7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USCW61981003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb286c5c10543e220dc0cbc3fed1b6d0fdf8671c7c79eba09eb93723032574ef3. 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/USCW61606911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d5c1d48ac78dbb57b847dac936728b37e708fe21e279918bdfca31c7785dc6. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-05T11:01:08Z), 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/USCW61606912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56bee4f12d7874c70f4e52d33b1eacbc84bd7aefba1029a31d73ad5b9a3a861. 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/USCW61606914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf813a026fa5c2ea016fa15dfc9cd618a5610c19eb31cc38d882e153c50e4d4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USCW61606915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ff62914c880deb7ab4d5aae6ebeffb5fb943d4e07d18b3ae17b1e68c02f431. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USCW61606917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c0148e9ff007633e608eb146de130b10955d955fd003e09e3b40f8a7a608f1. 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/USCW61606918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6bf5a14a114ec590f52f47a101905943adcbb61ad370bd1462f5c9d08049cc. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USCW61606902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac4724d878774406eb84d8ce34bea926a16b159a3b3ca64efa2ba42b0367581. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USCW61606909.
Majesty Suites - Entrance of the Queen of Winter Dawn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a384bb77ed6c9b2fec6645d774631d0c797cb15af13ff132a18f5e8e1f9093a. 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/USCW61606910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6bf5a14a114ec590f52f47a101905943adcbb61ad370bd1462f5c9d08049cc. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USCW61606902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f425b78afe7c53bd1268f0dd7a048651beb1938d3a9d8631d5b1e3c5469a33c. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USCW61606903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36eab774931f595b3b5b80031e6fc0dc6b9b70f19b531853b9d0913389c60bc. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USCW61606904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234ea2f0e4fbeef8558a4fb933f3725a080241c212e01de7a7c81baf0b10aa01. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/USCW61606905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf813a026fa5c2ea016fa15dfc9cd618a5610c19eb31cc38d882e153c50e4d4. 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/USCW61606915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55bc8eb39e13c1fed911cd1e48d7b07997e3c12766e6458583683c48bd5ff90. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/USCW61606908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5b4a8cec17644c5186b1027cc6b5dad30414265c01f0d4c84143f440c5e11e. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USCW61606916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ff62914c880deb7ab4d5aae6ebeffb5fb943d4e07d18b3ae17b1e68c02f431. 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/USCW61606917.
I Am The Center: Private Issue New Age Music In America (1950-1990)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c6aca19b7b83a0293a2ed83bec1ed69e43c5ffae39b79ea0d4087d43e903c5. 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/USDEA1310713.