thumb|Human pulled along by captive dolphinThe popularity of swimming with dolphins increased in the 1980s and 1990s, occurring in over 65 countries, both as a form of therapy as well as a tourist act
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 0x0bfe465f638c42c6a67aa41f0c30becf061993da90b04a9d31d3a8b94d801b36. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b310668-21c4-4e8c-af01-d98ec8be0bf5.json and https://artists.proofprofile.net/proofs/artist/5b310668-21c4-4e8c-af01-d98ec8be0bf5.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 0xc6e346829eb30bf2cf0b3d00924b624f8abe30e9d1c3528105e31d4ea6510cac. 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/USTN11100089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6841cfe15e3efb510aa545c70504639f000182ff102f0faf488100f3ab94032. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USTN11100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0c1332cb54bbe092f8e16529bccb0ff41ee81d8247e71046227a1fea0ff423. 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/USTN11100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a97cd8c3a5000fa466e357f424ae2396f3a69a77995ff56b8a1beab5084554. 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/USTN11100091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c2d00fba88bfb450b1502ef801cf7a409f8e3209ea45c2d2efb1c3b55d1879. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:04:00Z), 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/USTN11100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3276f88be6bca1386dd465d73eedbeb6904fd705a960724ecaf8ff6ca65bd1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USTN11100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d1cd4f258c971f84a69ac4efc86baf50c719c65198cc24c48d14b501d88933. 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/USTN11100094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31402412843aaaacf5d4d30c4839fe01c3d566c39b778321bc221f633e7cb39f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USTN11100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d02600c6ad19e3f8f9f0eca0d73582328656f4f0f36c398ced42e16eea86145. 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/USTN11100096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd710fea2b30d52532f04c0c6b67510d5d94e8b1e71cb9023bae045648467b145. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:03:07Z), 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/USTN11100097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58191a51f080bcdb05bfd57bc36459c6859d480508d438af39f5b016dee06c80. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCADL1801909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39833fb74494193e144c1249cb982f224bd7aefbba0b9b9ea4d8b2275c12fa9d. 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/USTC60853875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bb321e4743f512600b0846f72a62095e1a617210f89d126b66fd9350f089c4. 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/USTC60853894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbfaf8e9cc137d3d6e21d37e83563887e978769b0e8037e69f84f5510e4d958. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USTC60853897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95105b4ca6268bdbba0bd3e8a495219ca858a11107e5c7feeb2e2df9e4f7851e. 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/USTC60853899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b4e34b73bd15d2a4d60e7153ec59a491c6942d3fbcf00fbf0b5a862693a63d. 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/USTC60853912.