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 0xce5b15317a68781fd613f962814bde535d8b63f8a95a034582cd824dc95ad88e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6165e68e-6047-49a4-9765-bfb4b50aef46.json and https://artists.proofprofile.net/proofs/artist/6165e68e-6047-49a4-9765-bfb4b50aef46.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 0x3caf9ab0daa9397ebe08c33df0dd885cd722ac9ade2a8af62cc8bceb20df3f27. 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/HKG731681306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900140589aa33b088427b65abaac9ff0a13d770c1198798983c05b5b26d9c5fb. 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/HKG731681311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25691aa162c0a48f5403cccdb852335c29d7b8e00ef736922f59fd1697e371bf. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/HKG731681307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff75095f7f9a18d40058533291c25ff240d670e3d8d0fa30d038cd0d1ccd0f1. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:46:33Z), 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/HKG731681312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28761e581181dfaa355ffbfd06d11f4894a0f1b4361d49c258dc440c95db7dba. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/CNUM72500247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06576aa00374b08b16ac56d8616e91365cac3ae1f49e928f57d724bbaa5d04c6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM6P42486280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783d8e1c4cbd38b9099b155525da88bedab9aeeb1af6585d0434145a9b0fce99. 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/HKE022234777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ba2b09e90487995599b2ac546386a51d3b12350facfc74cff8cb0039ec44e3. 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/HKE022241348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ddcb1dc3b7fe3fc32d5aaa72502dbfc1cbf9349555f2863f485acf569c1fb0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKG732349532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25083b18418d0ae1a1db3b3da9760b215efe790c7d343576cc7827ac63e6bb3e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR2X42155527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dea78bd7282c3c50b9b1c2af7e0695ea8a72fd2fb2f578744e89207076415ea. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKG732349528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887370cac7f2b53e74dd07a1f7e210dda048f2d484b38bad477ba4cd3617b399. 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/HKE022258059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ff8ede7ad1c06a99ea7d36f432d0a966e7334776f7cabd043d1cb3ef80c699. 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/HKE022234739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802e89405c554e32e63aaa831617e25e0efac5d57c33fa6e87b1e18d1cdbb336. 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/HKE022258068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49194caf9832319abdef79e2956b1acbb4563913a5f40051bc4b730a45f82b82. 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/FR96X2311682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddef65845f6ef60aaa977c1859d27c086d429a9e573453d94ad3be28e7e8fc4c. 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/CNZ852309621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22786537eda65e5b170795d8406459f0252f84c203abd1732e75db5a04ec4280. 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/HKG731697730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4016606d4013a1de0821b1b1a348fb4476e0a8992a1afc41191e7ed711b8cc37. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/HKE022258012.
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 0x3af15dc72e8a5ccaff3fcb6d502adb91a72ad475d05b4d073acb69502b38c0ba. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR2X42157960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790d29e8efb94effbaa0db306b8b9dcc8cc44f0f1461231e6077221ca412fb72. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/HKE022258063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d3e63597dcf392f1d94f06b4076342ede0a9b05ca6c3d18708774347778ba7. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/HKE022234783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6077fc12825f0ca0932a41721cddd73b06b0b60caf7f10618fc8cc7daf03dd68. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/FR2X42155517.