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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f9882f835d2ee62e7bcc398465882e5017577ba065da824cb9c9e6e944b4cb. 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/98028289-b92f-4c8e-a7ab-ba3b382c50ed.json and https://artists.proofprofile.net/proofs/artist/98028289-b92f-4c8e-a7ab-ba3b382c50ed.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03a08c9af8312a269a5295df1e9bf492635fc29fd3af3e25f9540cf92d5eb6e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ5FA2450007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c69ffe8939228c972d38981cf226fdd526c368030b69190b184ab80a1b902bc. 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/QZ5FA2450071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf56e57961c6d36d429d1fed5450d3017c9427a1b9158a966c236103fcc69af8. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZ5FA2450073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b3e45ac78ca7ee1b3ed51b4ff43e3e51c3078e7f1c737c44329d6a9f4498b4. 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/QZ5FA2250135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685ce9c4dca50ae07a9f18eb6b7caeef924e142e15cd40e38c96453a01ee8412. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZ5FA2450074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6dd3574b303937709ee28d8ae98d3a2d7fa01c107a15583c7e196b894c98494. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZ5FA2350229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071ca81ff868ffe249d479408629dd19248875030907bb05ee2fd24b06810df9. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZ5FA2250148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7094a2741005b753c99a324e650907d398a04e704a388a561b1ed46688bb969. 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/QZ5FA2250145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b3e45ac78ca7ee1b3ed51b4ff43e3e51c3078e7f1c737c44329d6a9f4498b4. 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/QZ5FA2250135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd629392a1120c49c580019ead0476128487de58bfb8ed8f62033d277b2d1430. 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/CA5KR2237940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64d364d49b36d15321ee96cfee83e2d23c0b8e4cf9818389d91467a922e006c. 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/CA5KR2235670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa88d9b5dec3534c0119a35f224a370b2496beacb047cc1b3ded32e8601a467f. 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/CA5KR2170318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488dfc080d858ea3e78a571be639791c950ca5100c019317dd2224780797c622. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2140078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca821c14a50c165478f5fa4793fec3b77c7e036d2df1af4f24c2f55281e14b91. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CA5KR2120233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175b549638ccddbb9ce355f9a311577af91ce32f80faa24b935274e454b52cf0. 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/CA5KR2110212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2bbc7221b6b0c87d4c7876e70075dccbf011140ecfb2c0a24e82d92f052530. 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/CA5KR2088817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b816232d9ce89ac26775c4f9655004c55b0b3885c876fee8930039f481c539. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSM12005115.
Beyond Traditions A Christmas Symphony of Complexity