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 0xe13fb3cfda18260c098bc36e7474476d7bc6504c8543bd835fdb935c4528a75f. 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/b0470e83-ea64-4dfb-b4a0-19244e38f54b.json and https://artists.proofprofile.net/proofs/artist/b0470e83-ea64-4dfb-b4a0-19244e38f54b.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 0xceaf5a144760ea9de2e3a444c453b52ff0590cd901d62c2282311ef7ee69d153. 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/GMBA21464285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a749e3d770b3fc2e259f26e19fa26fad7bcc757f279f7b266cb17d913ec4ec. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UK74D1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51848fbd511a3ed0f21894357b10237d83164c587b9c5974be5b17a90893fa52. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/UK74D1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcc53055c7ede3bcf7451dffcddd1d2414bb78b374e3dcfa47b45e9e2a011f2. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/UK74D1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448fd123442561cbbe3292dc9bd1cafeae291ab95fe0a9b524fa3d401e3b6692. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UK74D1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb9a15b16aa21fefc860b575b03414d6178da043a87740becc468db151a8e3c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UK74D1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b542046c10fa89ed290b8332e4ea50eb61035005ded1c64d63d03731a23d0d5. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/GBMA22001795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cd0ed4d70a8b6dcf57663335eba3e9d50868a02f233ff7c1bb3be79cce34c3. 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/GBMA22010297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6aca5b931b575c03f7a06640d9687bd80374557862df9fc2bc7566be1905e2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX3Q92000553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e156f8aa73275a176d05761315bbdff17a1c735aba08e7b18d05a61fd7bad5f. 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/GX3Q92026267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9170bd066c4c3b631f6654cadcc315b79c4da1cb2b6748723edc7e912c13a61e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZTB52414992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1e641b20507839c691e4deb34cc916fa4ae2598d5f06c032f5a6003e029387. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTB52414993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f76379811fd72b229a27c629ac9b0a3086947889fcca2f664cb1f83bb5b1f06. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZTB52414994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae721457bcd77bd3e14b907cafea8b06162e72246a437e35d526fc88f8b5227. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZTB52414995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46ad4a1559d72e83355cf6e20433b269d4fc63dc294e2995e973536599ff078. 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/QZTB52414996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc408eb0b3c94b1f3577a370b6cda7a0a6ddfb7335e915d3da173c716c62357dd. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZTB52414997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d93108c308b90cb70efc64ea4e10ca862fea139cdc1e205506c4ca21b2c756. 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/GBMA22357653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e200a5bd42400b80e1963b58b112eb4e576ec25816b35ce3b2a97658be7c23. 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/GBADD0800105.