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 0xc95896fc34fddc19a019aabaf9a0725ca81ba1bca3b51a788899d816c54ac3a7. 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/4f10609d-11e7-4974-9094-a9dc7778f37c.json and https://artists.proofprofile.net/proofs/artist/4f10609d-11e7-4974-9094-a9dc7778f37c.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 0x7849d06307b37a773ef929cb30bdb7bce450f803aa694c4376e8256e153455fd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USAQB0515009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18b454ecdb6f4868ad5c99554d808e802eefda920039a126e0f18a75c1f72b2. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USAQB0515006.
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 0x6b05401f7b0551fec4d13c869a987564d1a59252530db52daac3b73f4ba58f06. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USAQB0515007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c7ce3560f56eb5e0c37d06e41cc52574b78e45302101ae4341525149e11051. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USAQB0515008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6d130757dd0fb165e03a656e310482dd376e62da9e498140d560f71b4b6ec5. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USAQB0670083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3383b11a08c5b9da6eb2756ad754202e76d1de190e6d02b986983968d3f12a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USAQB0670106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9dead5a06dc4618cfb67ce4361a19535afd52e1142dcd72d44cb70dc755de0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US78Q1110016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c23b0a8581f2c87062df0ec1a51bcf25c9f244356ab5947c72b1aaa78fbf711. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USYBL1201121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510b874c101255acba4ffe39afeeccf1d7220076ca22315de04d0703e48395df. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USYBL1201124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9269f95576a508a1a1999ff78cc1b5fef332648eb1adf153d6843991dbf76b. 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/USYBL1201125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd548568a1dfc5fb1a3b0457d684f9850c09bd1fbdbcf16965a3586bf019c6daf. 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/USYBL1201130.
Dubby (feat. DJ Rashad & Danny Brown) - Single
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd912e9b95062b5014c7749d4df3b6f48a67c541c1631297309a8115ce3db067b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLZC1300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59c595ac801ca3e9021ceae662a4548888162ed67b434d5dc1a5de37f8be012. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLZC1300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a5c85f2fa7901eab87e8957d7fefa0fb84d6a97a94d7fead6dcf4f08912794. 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/GBLZC1300095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fb6f33e61b17400fded663bc2849dbe3d8c4822dfa374a109980ad9fbe2f4f. 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/GBLZC1300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf5501b2cdc0eda42663596ca95448ae9fee8678f2a221fc7bc2ff25828acc5. 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/GBLZC1300099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654022c4e1556c7242af4a3d3b98be6b778c032d5d240b16b3fa142c3cf088e8. 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/GBLZC1300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011c448e2faefeef7b0f31c640cc154a5bb1c37c5318c0b12230e9edc802b834. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBHLW1600350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c55a47c0c8fddbbbaf9e08e8a28c7b38abc5e0f31c9f8b26effdbdd642e7ef. 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/GBHLW1600352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60162459f28f7ecda27a84fcd92acaeaea1f1ad160014d1055b7a92ebb919385. 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/GBHLW1600358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92659f5037a31a418a7386cc72038622f7c00a2baa47a3a9a3de9f5a8cebb0bf. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/GBHLW1600362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f35459b4e0ea106b309a041b2446d8fbe185e2577a5be34b5fc0adf79204ebf. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBWUL2430062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf236b03536e4ba64fd82565fd9ebd1d39b83d1bed6b410c1cfabe0f0665887. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBLZC1300097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1884ac773a6fa8deea6f2aa32b231ae82a73179885e227ffa908941e46837da8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBLZC1300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c958e9a948293085a4452234bf1d1d50e0df1ac2b94496ccdc107435f3815c2. 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/GBHLW1600355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f49a2cd4853caeddf79bbc2df144d9b649c4e0288b35ae58428d1cff486562c. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USAQB0670069.