A boombox is a transistorized portable music player featuring one or two cassette tape players/recorders and AM/FM radio, generally with a carrying handle. Beginning in the mid-1990s, a CD player was
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 0x455a0014ac5d2fbd04bc601d96456c606e3c99d3d5f78f6daf263e7d0a5056b5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3b203b3-df75-49d1-932f-729baff9492d.json and https://artists.proofprofile.net/proofs/artist/c3b203b3-df75-49d1-932f-729baff9492d.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 0x5a63e8896336613fac19702229337d4646e90103252eef5683eb79894e761719. 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/USCGJ0575624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9befbe8603e0adf1baebfcb3d4dcbb5727e0194eb9268bfca4aa3641f0e4282e. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USHM21097103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d2c80d4f0769fef30b01b17a8ebf27c28d381639d3a063caf94ab63509c94e. 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/USHM21097106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5892dca4886bacc62e7f631471b109cd3a3c02069ac59bd2ec873498668ca2b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USFLB1300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996bdd46a90ea74994788f372d2f51af789a8e427aebeaf49c916a10c141d94f. 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/USFLB1300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac597456f70dff97c03ebb2adbb3c58dd430ef4799572502b557c97654699a0. 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/TCACL1506395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c6645e3afade4d34797dd0b61d48675f9ae200870224f45e11f291d258d165. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:50:10Z), 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/QM24S1830150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb4b1e263522b475461b048b59fd9eef059003c0b735e233a277bd247cf2690. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:51:07Z), 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/QM24S1830152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c661987bc84ac49876d22354212026563288c0de7b3f9706cdf99fb848d5b9. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QM24S1830154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fe6bebe2070aa298194750836a7a81b33e51e0cff3f57db9ec2a460a8b644f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZWDD2304072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf31a4925ca4258aec1b676ba530d900153e398304fc519010040ef8cb68e459. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWDD2304074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c68fcfe1a1ad2511eba76823dfc11a3c4efba373548030ecf419259a5f22d3d. 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/QZWDD2304075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba6d531c0a12c2cf30099c9626537bdae4e4f75794fbed612024d91f057cfa0. 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/QZWDD2304078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2948331dc7c7a99359655f82c18add2216e27eed92221e808b086a3a41f5a8. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:48:15Z), 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/QZWDD2304081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58afc9027ad2c63c1b2f923d2548b0d3999678dad49fdf77546138edc9a8385. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:19:36Z), 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/QZWDD2304082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5de5ff8a384b0d59651182a222a7e7c09a2e0d0c3db3ffd747442ed2c4ce63a. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:51:50Z), 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/QZ5FN2499293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b0c51a19727366b50e933a33980d59fc672e00a4605ffc8effda23c39f74b2. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZ5FN2499297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8eb54b5accb06926d24bbc447cd927c3c26ad853101aedb26cc40fda7dd892. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZ5FN2499299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a2800bf5bc285e6aa2efcfa21df968b64546a5789e0391e236cc39ad602b5f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZ5FN2499301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1032c72835f81a10f16b67953613d4beb183acaea952f9c9ea76f39ff2e09a. 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/QZWV32459246.
Escalator - Homero Espinosa & Mark Farina Unreleased Deep Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81da0f2256aa14224425dbb03b2b64468ed6ae181b00e0c61cbad692c3fcce34. 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/US5X22123506.