thumb|upright=1.5|World map with the intertropical zone highlighted in crimson thumb|upright=1.5|Areas of the world with tropical climates. The tropics are the region of Earth surrounding the equato
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 0x0f6150f1ea3082694391c8bac54e7732602f5c75189c9912f79c4a8cac36a2fd. 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/5d671c1c-3eff-4c84-807d-85a652a7d3d6.json and https://artists.proofprofile.net/proofs/artist/5d671c1c-3eff-4c84-807d-85a652a7d3d6.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 0xaf4521960a1ce0fdf21dc3bd3e43e3555f60096b6f10ac848fd7ec9b2246a301. 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/GB6SL1100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594bf457ece4f4eb1d90dc3ce91d02fa19ea278998516f0837650205bfd33f86. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBT7D1100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49c2231b6c297b17397965a6eba0e0728aee73243c564f52aea08a1a74878df. 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/GBT7D1100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b442091e0980374aaff49ccc95ff072f7de5da05ea969ebf99f8a517b64b442. 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/USD8D1526001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507e59f1ef6f4e4b7d2a8b0e229cbb8b1f928573e00bc951cd0ba9e0bb7ea1cf. 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/QMDA71875433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a493deb38e3ce669ff579b080cef22503c317b3049ff7e8dd5e874c8aa24ec. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QMDA71875555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e64419d54187ca6a99cc0b102480c0ac339a7a54d32a2ea7f7e8dcbed59bdf. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QMDA71875762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb186cd760dce99c4e7e0ba622d3c9ccdcbf8847f31438dbbe5999f0f6046c5ee. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QMDA71875769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b722e417360f41e0d4d6dfed78b42e29571fe329bfb6e1cfeb5c25cfd138f4. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QMDA71875814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de0d821f44d5f60e84030d4273660393520ca241873e32fc96860466842f226. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:49:10Z), 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/DEG932302266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f7c2caddf022d437746e601785afdf684bcce6050bb81e96f19d079a42f874. 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/DEG932302263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fef45da57310d835e0e15028b4142c686f454c2a4ab32385aeb4b157a20844. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:36:00Z), 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/QZZ8A2577662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b360d23f99358fc322b20b48eaf62d14e8a3435b328f3361d66f09d94830c3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BEF341100001.
Global Underground: Afterhours 10 (Mixed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5426108badb291d8f5bc21b5f49f4337bddd587382cff8a75ee021f4d510fe6f. 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/GBHFW2400120.
Café del Mar Ibiza Chillout Mix IV (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14a7d529114a66d08dd3b5d1663cab57ca5b71b4ca2db61e6dba1be04bd0bfa. 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/DEG932301895.