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 0x29aa946b8836edd62e73f576e1ed59cc46a78d9770b7d3b1eaac2f2b40a027d5. 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/e0721d0f-6870-4da6-8c15-766a46292eb8.json and https://artists.proofprofile.net/proofs/artist/e0721d0f-6870-4da6-8c15-766a46292eb8.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 0x2bfaa559fbc4b2c07691df37f772fc8598618bfe5b38990bc96e3b4cdf6497d4. 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/GBSMU0000861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd679ae45121d14e196bd581b4de6817bfd6876eca885c3114e548b41817efd0. 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/GBSMU0000862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd3f14c2e6cd87199576a46065764af256414f573681f292c2bffa32a5bdb86. 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/GBSMU0000863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb3c69e35f0a640e79e4c1d795cc2aaf89dae8976714f111e50183f23e9b7f4. 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/GBSMU0000864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4821ece9551b114b37968b42cd27b2493a418a4d183e42b8109f7fd55b4c812. 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/GBSMU0000536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88432d00de74578139a79f35ea0970086c52091b19a18e5c93a9768c8ea5115. 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/GBSMU0000538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4d6e41a0d48f05b4dd8bd6f5e695483ba24c9af936c1a099dd7244de1a4f16. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBSMU0000865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda30148fe8f325acbe98478aeb4e2fba6dd8094d4734b7a84f0dbda8d863e3e7. 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/GBSMU0000866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe7d79a849755fc3dfdc9406750dd1f5984ab3bc341f72af616569a52792a19. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBSMU0000867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c473898a8942997f73d63d2930a8c3f745b31eb087bb86007cdadcad9f70394. 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/GBSMU0000868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04dfec932f0c302b0d19763e09f026e05bd25c0259bcb0e542a8de79039c1827. 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/GBSMU0000869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0509f5a20f7f5c5ba9c2be058c08a6f81094016c5111a8776d6a454dde18a66f. 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/GBSMU0000870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbce313c3064779b87d3f41c592bc450c2ae08132cc745abccbc537c8de9d161. 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/GBSMU0000871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1945a3c77018b10f6eb3cb0807dba5dd2ffbfbc55f7dac2e2cc99843b06fd5b0. 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/GBSMU0000872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1936c8677df88b1147f7845a9e49523be8a16897a13e9234e3a33287099e1b. 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/GBSMU0000873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21413e725bb89428e4edad6e77cf3fff7267496cf48d2e418319d55815fdedb9. 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/GBSMU0000874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e18324c6b127b54590acb5e62aca869959a5c8ff1a7f4558d7fb16284902cf6. 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/GBSMU0000875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcad5b4ca12c95467ff8ab52a3ba9c2007874f49594fe837371e36850d7ea27. 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/GBSMU0000912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8835458b1f873fead23f727e13ae390bbd5856c4199bda779dd4fd22b37c7e2. 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/GBSMU0000913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922e928909a21802b4b68ecf9313e8843b3a585fb50bae753bc5243b99df5d11. 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/GBSMU0000914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cdc5c43c2fa325429a807d6cf40ebca5748122c5fe4d16e5b0a4f51f5e142a. 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/GBSMU0000915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ec08da0e0b1aa1fbf5ec1342aa484298f89687396e35c398a58bed2f74ccf6. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBSMU0000916.