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 0x2e5ec29fbdab52e8226eb627f964a8686ff2aec2a4e3f3c7f4d7756cc3ac46ca. 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/81a6cf48-379f-41f4-9eb7-bea86b4278b9.json and https://artists.proofprofile.net/proofs/artist/81a6cf48-379f-41f4-9eb7-bea86b4278b9.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 0x3108f565869b74c7626da607c6189c4ef35e2d37ba3fa89fcd1fd2f34d57cfac. 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/PL50G2400835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe25c56b36b97259fa9fe6fd72af07243f41c21698a27edf53a4aafed83e3859. 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/PL50G2104323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43dc8604e7dbc490f0584f54a240285870c9e4ea37f2c81d7f6b4b058bbbb676. 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/PL50G2104329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40a120e77040031e8e665b24bf0bfaca0d33ba3106177c3d0408021eceec606. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/PL50G2205929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfb52f5c3fd9cbf09575822803a5f3faba9dde07f5f949656218ed77b9128f4. 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/PL50G2204837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7510941744144d06475b3849398a95256c984143c934e4fd1a754a6f1b89ed. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/PL50G2204841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeacfdb4e72a69cd158170a081a715697c416f4e46a11a50eb768d7d414aa86. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/PL50G2204840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a449c33ea4a53cc7f79c03073bd28502c34d79b06a170726389deb60735fae. 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/PL50G2307523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8d199c72cb943c70417cdc251a3156c219d404a89c5d23e82e8c3655b1e979. 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/PL50G2307524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516729ac700ab4e0e4fdd75d3f2facb4748d0d37df3fe822c6d60b5b8bc46a24. 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/PL50G2307526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e388fbe57db2419dfe1cc976efa93c45cecc0f02d43530b30609ed81e31591f. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/PL50G2307528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f985caf752ee2ee1ee3d157052952b08de049b0277d2bd5e2a9f425db8ba59d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PL50G2307529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758b8cbbfc70eebefba6df3178065525c3bf8d56e083e808da06482b27a8a5d9. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/PL50G2306949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba4ba1eba62f9ccca38faeaf3fa3a67f9e916ae6006382703d30de22cd39690. 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/PL50G2306950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca893efafa55b3228f20e855acf6808c2836b445f063d871e3d54c3dcd4504d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PL50G2306954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758b8cbbfc70eebefba6df3178065525c3bf8d56e083e808da06482b27a8a5d9. 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/PL50G2306949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba4ba1eba62f9ccca38faeaf3fa3a67f9e916ae6006382703d30de22cd39690. 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/PL50G2306950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca893efafa55b3228f20e855acf6808c2836b445f063d871e3d54c3dcd4504d. 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/PL50G2306954.