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 0x7baab14476222c17af8bd06748f851c5a2004f2bfd1ef902f7e9a6c039a91e6c. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8945376a-e978-4317-b89d-823c5931f20e.json and https://artists.proofprofile.net/proofs/artist/8945376a-e978-4317-b89d-823c5931f20e.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 0xd0c3e02af22fcae5c222c953031e388b2d1f6ce81fe59100a2aa82726ff42bd5. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USDY42492895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e79a2446d993566644a4f0c5ebec2327189c829b362e9603ff351458a92e73b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:48:25Z), 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/USDY42492896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6ebb97cd0225a92145723406b13a0f3d5d34f366ff1d85a1eada55ec1f9d2f. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T09:59:58Z), 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/USDY42492899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cfae2fd4379e4b133687c5ba305332732e64d4dbe599696c69e037f9de0d26. 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/USDY42492901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64fcd1e2ea52d6ac31256166366e79bf4ed3743c78af0b612a4c2b28ddc6a14. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM92499167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae00af6b2d8a197726244be8099ab40017c8216cdbd4320d0a88fd2cffcea944. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH2520799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d93efa5b703be5476b26e299e1bf5f44464e19ed7fe798a1f8395dd68cc209. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/USCGJ2549814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc110fdaab9d5b622bf0e72e7a9bbd54f3e3fce5698b51fb93ff76ec7e54e17cb. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:28:28Z), 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/USHM22576119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f83cc05e71dc37d2aef1474f6c5f4b18e14027d3d693063dc1a1e1bcf365ca8. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:10:55Z), 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/USHM22576120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20319cc48dbaa7fc8c461100137986c0dd2924d96a5497a4c91d82cd826d54bc. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:26:55Z), 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/USHM22576121.