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 0x1b75bac508be515f44e7fb37ffc3b046ddc6362b707c17366ef9f84659a0dd69. 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/5ab69d64-698d-4a47-81c2-ee4eba9bb37d.json and https://artists.proofprofile.net/proofs/artist/5ab69d64-698d-4a47-81c2-ee4eba9bb37d.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 0xc8a1732e039d8d5ddffa5b8d1886f110450300987eb1bc5f83e86507ea5866cb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US2Y30761376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb52f4bf0e5bc02450ede5f62412c9b7fabb93549935ff9d4de5400e8bba87d7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US2Y30761377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1a4837599c7a05e2454f94e50385bf7e0d461d4658f49e72bdfe623f1ef03c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US2Y30761378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf489cc5f2df4a271c0618b471a6402b29e9a6298606198a090668a39ba80b9bd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US2Y30761379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3117caa613e4e5056f68d13d1e4b9091889ebf100fd688ceb25347c5d45411. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US2Y30761380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703d3914b521027e3f11274797878a00d630bfb758cd2330307c86a2f2c43511. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/US2Y30761381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1092ff23a46309894ab3112ddcc03df3725c57bc1aa005734cf1b80f79184ef6. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/US2Y30761383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9312d2e8bcdd5e27f2dc6393884576ab9eec11c86fdc0abf127092d2c0ebe03. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US2Y30761384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9817cf37af648d9e629e42811864db6fdf4d1d294b761d73ab2aeca13aade8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US2Y30761385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea300b2d5db4c0320d9494425023567172958a8ec4d0b0b131ae90f9014078b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US2Y30761386.
Survival Chalenge (feat. Reks, Kool Sphere from Verbal Threat & Krumb Snatcha) [Cuts by Chinch 33]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c137fa180e1a2cfeac7db8f09bb1a13ecd9b77622d364e106d2e82d968aa0ba. 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/FRPI32200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8866dc17c0f3ab02280872352e8e00b1b4c350fab218d75831b1706086c72363. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QMDA61839795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81d63713b79c6cd10bf5a76ddbe2ac2b0b9c04166916945878824933e8b987a. 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/TCADR1832420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ae1b0aa6d2b6eebe7c6cfd8da98fe3f582b9e4f72f5a388e353638ee8f1db6. 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/USVI29800601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fca4498ee9ba84134705a36c240e4e833e02284143d2055efe6f8bb40c4b0a. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/TCAGD2202534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ae1b0aa6d2b6eebe7c6cfd8da98fe3f582b9e4f72f5a388e353638ee8f1db6. 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/USVI29800601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11775eabf4884ca58b06cb8f10921efc03800cca454c4a3a8c935e3eed799f93. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USRW50200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33c9e03cea8337619ef34c588e42d5a07549f4596e31aa2ff9c845456c21d51. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEG930310364.
Mass Appeal: The Best Of Gang Starr (Explicit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f1a246aed2d25b7568eada6223fabbacc2d43436ab20c45e1e68ce592c6b0c. 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/USVI20300091.