right|300px|thumb|Ash Island from upstream right|300px|thumb|Boatyard at Ash Island above the main Molesey weir Ash Island is a forested, drop-shaped island in the River Thames in England, across the
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 0x51cb4467b27de9f6e6eb068e25e67fd43752adaad2de6baf4b92a37dcd769b1b. 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/068c8c26-e26a-48d4-b427-d169d09d03d9.json and https://artists.proofprofile.net/proofs/artist/068c8c26-e26a-48d4-b427-d169d09d03d9.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 0x52d303ed019dd921e922be542aa4c2acf3e954ee6432579dfaec352986f3fc25. 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/KRE131900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393c9f6812d166219a0858929fc2ae3db1aa9bc1661a1173d61db03bc49bf4ef. 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/KRE131900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd402d9e60c612f632411a193d89365b2370b9f266c2be9073024cd2b42bdfd. 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/KRE131800076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9326f65b47d1a6e4f3ecb95f222b7bd42616cebe0a887bbecf6da4f5feea70c8. 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/KRE131900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4343f1ae0b3ae9143f3b57acdf3c935561d0796ad3d31802c12198e41c8cdb. 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/KRE131900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907f9d7f7d05de093e65ba9cd6b14092effeb1bc1de99538fab50c34621a2580. 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/KRE131900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf35cae74fd824aff0582315c928bb918e735093324682b67d49224e23d0eab8. 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/KRE131900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171f393a7a9bee1b414d7efd56b6e65132a1ce8eca3be0564fd77d1cbb0c088c. 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/KRMIM2427554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7a113192ab877a6b04c8258cfae58a4de053551f8dc9d5b6ac80860f56b2f1. 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/KRF152000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6b2212bd497c8d7206572b85c83924db84e4c8006298d9d8e9a18ddc9130ba. 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/KRB142000008.
gganbu (Feat. YUMDDA, ASH ISLAND) (Prod. TOIL)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5269c1bc73f619f37c6f9b5828aaf9cec6bc8629cfa1e851a460ed660e9cd09e. 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/KRA492101299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c12d254d5f9157e369fe1a1114d30a0b7485264696fceed7e88e4517b3b0e0d. 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/KRE132300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce42f3c75e760582955cbd392cbae12724bed6e1f8baf1b996bf29e9c58c9254. 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/KRE131900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd1b252105f061a2cb7b26984d7176b02123c6f2ad75d291f9621f500a46869. 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/KRE131800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff2e115ef0635d17cd34edc19f779077a65431b9555b727b030e9b45200c63d. 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/KRE131800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27ecb6ea0dce740c0b7b16b7a5883ee7b0d69382a2642be4fdd1506d21c4fb4. 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/KRE132000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7297de76843657700614ce6841ead67755012ef47767826dca71aae0fef4c21c. 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/KSA012181726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1752c55a993b772f0189d87ab9ff95a204bae1bf6800a35bb90106facdced118. 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/KSA012181730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7fc7f994b9f136662f783a644eef2c74b68bf860ef9de91a01a4d0f602fafd. 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/KRMIM2400666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f1a39a961d58695e756b1c17d337d9b3c7e6a9233bbc7ae7c8c93d3e7cc2d6. 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/KRMIM2022288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93578c35fbc73cad17c58e111e1447213be211440eaa71593a1f4ef9d8cb821f. 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/KRMIM2022289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0205ceece425f2d1cb332dc7c199ad436e45dda7ef2db75a6b8d7111d2f6dce4. 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/QM6MZ2462460.