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 0x579f10dfb1c9f5e8f51b66dea79500c9a48ae4b178bcfa40cd30ec3b4c64deff. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37e518bf-154b-463b-b1de-5c2eb5954a89.json and https://artists.proofprofile.net/proofs/artist/37e518bf-154b-463b-b1de-5c2eb5954a89.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 0xecdeee1e5c49f261fa0ab098937d480fca9308cc7febaadd27ef7f14b44541a1. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/GBUM71503123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726e53208810aedcd3e9dc623cb369cbdee4909e9c874ee0c6f7c8269efdc699. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBUM71503122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c39409a177835c4e7efc9fb06d8b01bafde69cc2fdc67165966ad7583a2d2f8. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GBUM71503120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b40503ce4b7615b6e46912e4d2fbcccc8cf61d1800746b6fd8f767e88d73f1. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GBUM71503114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49073ae8d68ad2e9cbff04167750cf3671f7fc4d3387a6e7f897315912e270c7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBUM70814841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09454a93df43f0f618ee4e4059c7a1f0915f4343468b61b1feff561f00158aa9. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBUM70814842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cd1159831fed132164bb42c7d57fd0fb4b142561045613e9ea3cd776b88225. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GBAKW8100125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d4be14e1c28e223b171c952cd6ac84a7efa9ed56a0bf9b57a0df9e01008a36. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBUM70814844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4e92083260f9380e8ebffa90b16dd8978c77a03ae0cd30d89926f689465d8e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBAKW8100127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd29bded5c95b20a6b8076bbe03548116fb585596eb28fc60285e24dc1ee180b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBAKW8100128.