Boston () is the capital and most populous city of the U.S. state of Massachusetts. It serves as a cultural and financial center of New England, a region of the Northeastern United States. Boston has
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 0xc258bc6499c68fdaf648bd74a0b6246add8f2e2a57255d7d07f22765e8a5e449. 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/846142fd-642c-47a3-b2a5-2e868f9ff773.json and https://artists.proofprofile.net/proofs/artist/846142fd-642c-47a3-b2a5-2e868f9ff773.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 0x33ede27c2d573bb355bf699e33ec6fd7c6e48211c6487b3bb50443c206458d32. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEJ1962782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ddf74703d5f4d8ac6225dd3d4cf92f39b7a207060faf00049e6047651208d4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCADQ1832987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72db5dfaeb26179f5c4cb516c51c8ce74d3cae2e22249122a003fbc5a12a1c0. 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/TCADU1833613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d3a1cc41845566d0c571c74cbe445851f7556d3d271f4bc76bf13b34abad8f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCADU1833620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f8ebd078c286d1d2d9d6706e5b08e1e24afe59a2398973d7c3e7813ae0e7eb. 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/TCADU1833628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3b7a52340837a626f7236515dfab216b957af6666a8f80b6647891efeb41b7. 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/TCADU1833634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b88e2a3a8bc0aebc006309f400d9a318edfb7ebcab41b6f726afd464a3129d. 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/TCADU1833636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334a3e709c112b93ec158901b6dfa5e7467a635386a35e488df9fa85be6a9741. 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/TCADU1833638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24c7f18bf8e0ab2245432279a06cccd1bfac28ff386cb14231fadcb64202251. 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/TCAEN1958590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4c87d1e9740c4fd160c004bcddf16404491fcf031a7d3ac7a213ea7f72f024. 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/TCAEN1958610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c6c5faa4cf7e565eb249f0004f11aa8d67b8252227377fd37625b438e53df4. 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/TCAER2004188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5f676efb49920f99e5abc8db7e9874373b9dabbe3eba2192de621aca1c2a98. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEC1905571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349f00b6b98fd1a12d7d3d77f1ffbebe9756b5bc29536afbbd2d553f96103fa5. 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/TCAEE1950592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0755d62bf28f53954526c17be8b732b155a62e199e9d0d3cef960239da56226. 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/TCADZ1804178.