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 0xb76d4dcb59cb9c09b66082a04fcc9640a35e4f6dec2e0554d92ad6722b71bc76. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d128294-2cc6-471a-b1cd-23cb40c7b054.json and https://artists.proofprofile.net/proofs/artist/4d128294-2cc6-471a-b1cd-23cb40c7b054.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 0xf24f7cc20cf7b59fdeb048e9d1c1b6dbcdbf19140f717ef4db622880f91ac09a. 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/FRX282396931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6faa70d690037e46792213b55abe2a9679bcf7956fa8dd17ab9915b69feb65db. 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/FRX452321205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59d571f0ebc0d85362cd2500a0fc9ef55472e3f199cdfe8a3d83a3bb69fb647. 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/FRX452321207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5e4ba92ce2ffa9e0dd78c36623bc40358161c31fa6e20e8ac9262bbbfb2dcf. 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/HKG732124809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b921e68dba1380e33f1446e51e82e525d02870d73d4e844f4a358278c1ebd95. 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/HKG732124811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc12c62ad591c02447b15136b6b7cf2d3f78a2fa6685093d50d68410e611379. 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/HKG732124813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f1bca1e0144cb69160b7e6e7f18e6bb0577a65275a5636cb33dc3d210cad08. 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/HKG732124815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de8d8df7d7e1b71427a8cd9494869891bb7b76437e4b70e57bd9574a299fd98. 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/HKG732124817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f092516f997f4264b9b61c4d683da902332a34e5147c357f7f2ced0dee9d3a. 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/HKG732124821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeac2b8b61909d9709326d3c23b0b8d2e95e57344d1055688755de60ca6abe86. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG732124823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8d3ba07efc02821604517be88770ec1a278c777404dd4b117120be7c5dd25c. 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/HKG732124825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136d6875644790755d870920144ab1682d1a7912812871a5fa2f8edff4dabe40. 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/HKG732124847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0063c596c828dd35676af53ccf7a81cf7ec87093869c186b10661df42251bfbf. 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/HKG732138203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8e45c8f0e7866f092380e8037a9e237c827687d34cc693f986f6f99a872503. 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/HKG732138214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbec3db31726e7bdcbfce4befcb2cd38c44951248360d22346ed93cb8a826a9. 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/HKG732138225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee43edd373d3353bba0180f89e4d28c431cc820a70afe4373bf189f2d776041f. 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/HKG732157084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba886742f055b92c2d1b15d7711ae010c7514cbfd37b755e96dcf7250763fe2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKG732157086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a7f9fb138841d8e7f4201c9e6b61b2ebdc955e08db53a25b3bbd16362b5048. 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/HKG732157112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67ea2b2fd855b3d6637f79b8d606c9e42a0ee19aa390066e0a56579852a371e. 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/HKG732147189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158c73eea972ff2a3cf054f3d09970cbb4f5840c04d461259d222407502c3431. 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/HKG732124879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe436151eea2f932de7641e8c3b0e69eb976892c77116fbf8598b029351b3d22. 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/HKG732124887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c9a9af62a4a81802adb3b74d6f103cec33c27bf72cc06b5771db7c2b11406d. 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/HKG732124889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14718387251fab4b0e2c8ed0f85a19886c313025e025baacceb60803d11b428. 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/HKG732124550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff93e3ffcef07858c44ef9d819df631d7a798523befdc79e71745b6631265c13. 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/HKG732124554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9774094dad604d6d3bdbd9f61ed31c5331f78e1dd7fb98dafea7e3ca47feb4c. 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/HKG732124556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64519a07582d477d869a1f0fd8f810f84e0e2cd5a6578b33daec7bfccb844fa. 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/HKG732124558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd1717f7e929b6a037624ff763f3c0d21386676c7b625a22216427017054cb1. 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/HKG732124560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8dc3242d3001fe2bb40d3843d76b6623c80345003ed90d3b275c83b7de3579. 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/HKG732124562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8392bc66485ef3eb5ce9c2cc89cf5ead71fef9455bd6d391f6fb2cde4cdc8e. 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/HKG732124564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff963d90f3efecc3a72b77e4f1cc7dd5782a536be66995d60ee11d92556e867. 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/HKG732124566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f86ac72b79bebd3e8b9552aee9db19ce245d9bd9e7b4c9cc7e051f1d8ed918. 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/DGA0P2314423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3adeff5cea28017af55ef6473043281d873b2a387580fbfeb8e85fcbea6ae745. 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/FR26V2016812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a3c0141b0c365ab806a10e2e01c534a75c5802f63c17768bf91d5e443fc74f. 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/FR26V2016817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78700b7dc2317b95a3a90d891b1fba9b4706fea5010bb155bc3ae1c202f51e75. 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/HKG732280965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d65b60d5c26f6a4393c8fb38261d7749c146bf2d9fcaf42e32425ce062a63d. 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/HKG732280947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63170b6e24c04867c12aafe29ecf9f4e495ee5e30158c28dc04d17b658e42e68. 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/HKG731764060.