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 0xe81ef3bae0a9d3e61a5aa3d6364abeb63986f2f30f2e1362fe89871072cc5bf3. 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/c219fcee-b368-4a54-ac74-b487c20766f6.json and https://artists.proofprofile.net/proofs/artist/c219fcee-b368-4a54-ac74-b487c20766f6.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 0x9964923e7c5860ec33f49ac8b440dea09a0c23abffbd6a1e6fa179debedd2289. 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/QMDA72141425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11cfbcb02eed26359e1516a24181539baea0dd172c8861e06235d2565866d8c. 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/DEPI82501409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9973204dd6b9894cc56b097fbbb9bfcf086c3701346521771862db59c2610fb. 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/GBKQU2497485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe3e90e2463d8a1f60d5e2ff053594450c2ada5fb0731081269bf5c51f9ea68. 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/FRR642400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8599d2a787c6405efb15f9f409da61350775fd14c15dea20bac584a0237f691. 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/GBLV62311237.
Bad Things (feat. PENELOPE) [Extended Mix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74238824da33ddc4aae7940d4d8d44910d9a11f78e801faaa0ac7af8f3cb0854. 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/NLZ542300601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac3723aecfb59d15a324cc117dab6a0b441c0d7d6c1a7038c585ae46d9daf26. 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/NLZ542202037.
Gimme! Gimme! Gimme! (A Man After Midnight)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2103fe654f9c19d4147b8557dcc4615db8676e88df7e299e7d2d6a2ce98a16. 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/QZNWZ2193546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92c5d8fc97777fde6a4e9ac0ee956fe26e366ca1efa19e484ccf37e12720617. 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/NL1ZN2001150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78226c4c28fbc5a69747a50bd339ce9ddae3900ddaa3f3d4f95fbbb32372e031. 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/QM6N22165902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21ee80120e73a73a4f3c54b34007cab6202125955c406e9128e20cb55f9b6c1. 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/CYA112000869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f66024f106c5037c97387685f5408852cbe2480359fdc825b4b924c4483dd0. 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/QM4TX2132281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b81013d5a81066ee8d9fa739d4d40f790f8411f228799a0d7be4b6e22c6ee0. 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/ITG412100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea69b09c7074d3eb7ccc63fc778048cdfb637dd0d46191afd60cdd2727c9e27. 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/NLQ8D2000689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01254112030de0e1b3c8ac514c87b34b9efa1e04bf186f4a0471be56d1e22d4. 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/CA5KR2008333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b331a41011f96059328885e2f6fbf769bf8cb8b1ef42a50a517bb2a494b724. 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/CA5KR2002194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf55c0832447ffc9208b2953af96ff3cb6301cf1d86b2dfcccc55803262fb9e1. 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/CA5KR1977256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc8853eab7c4da8bb479e6bec8dca1b9b0327711708158477d19a2ace52bca5. 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/CA5KR1958809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425d0204ddd60842a18e4b0e50d78f1693c5e101c3dab0e33bdf250a7a274ddd. 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/QMDA62148861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc682101504ebf7f376229285d1477785efcd8825fdd9dc54a578b0c7b4d191. 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/QMDA62148860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb341eb7b52a4d57e07ed71c9cf76872d9bed6b3ebf062833bde5533a7a416de7. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QMDA62148856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5558e09503396e1cc0bf28cfafeec0bf8ed917f6c83f72c1a5a255cada252a13. 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/FRR642201316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76e82795c2b3d91924a10e91dd6692a789ffc0b3a4aad1796f2f37cfa785caf. 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/NL9KQ2590808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6924c46eeed7aa1b91afc23f0036f06b16e77ffb25f7030d3c9a6b294780d392. 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/NL9KQ2590720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2f5f83a0e495bdabfc03b2303daefb9a48ead697c48504178883bc7fa1e34f. 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/QZTRX2510093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527b91404a5216b4c3ebf4a78244008877b926bdc61317226d4049d3ef8ebc4e. 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/QZTRX2510152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd07952ea9f1172bf960cf44d8a11e0876f1c9e0f18e3cfb67dec3679960a31. 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/USLZJ2593802.