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 0xa0d1bf53f149f4690985fba83953c00b3149cf0e768531fdce43e3e784ae8b1e. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cf1a930-0244-455d-9685-602d52cbb0ff.json and https://artists.proofprofile.net/proofs/artist/3cf1a930-0244-455d-9685-602d52cbb0ff.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 0x34d95d985588af3c9ca29fee3da810f363d1f0ac380d1373a4fd3cf2135c0088. 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/GBMA21880959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacddc96e2c9c343f8d661f57f2c0c5f00aa706269dbce7694680241a9b1aeda6. 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/GBMA21880986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb766fa8c4efacec41ff1ce800b1d5ad2acd0d0564fb17cde44b0343e08ca5764. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBMA21880993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc0bde0949e4f24ea91518c2faaaa26761d65a09fd1280a26d359412841ba07. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBMA21881003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0d976673af5a010f929b1ea75bb5033ca6ee439d015641d120c894ec244361. 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/GBMA21881013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3863dc99e6d5b65155dff86fb7601e68f74f16a446c94235bc8aaf892d392f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBMA21881023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711188c8513ed981378337add0de0b0022442d854fe13501f22033fb06c74ea2. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBMA21881028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e2cf1af9662b0b7986c1cbff85997593a542c217db8b6297b0b4b705bcae5b. 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/GBMA21881040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8890cfb47bc903c060321e7f937dcfff5afe29f9f6f81e8496eeff33b5cfd21b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBMA21881047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140eef3441bdabecb07090e09c30baea2f25fb69901f553d55dc32869568c94e. 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/GBMA21881261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eca3ecc61e1beae495490fd93f49b9ff485ddb437447d2bc1f625e99836567d. 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/GBMA21881265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e27c3ec73ea061366a79f4340a0aadd41610628950af25023e04516a10accd. 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/GBMA21881271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f2926bd9bbdf5b406309366644666669f7659b63e226fb5b72073e38658e61. 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/GBMA21881275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab63aea7a6b83f25f8427591efab87c53da367c6464ff1ad361a945ebe56fb5. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBMA21881288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcc75753f4dda0af0151d7c06953223b4cc7f33e5d85788a60ba32bde1d250c. 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/GBMA21881300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601990a436b0fc557eeb0f9fe52a5d13966a85891248f66f4229440ce3106274. 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/GBMA21881321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52354aab92dd64e68f71942a6140502c922dd8184499dd52ed59df6b17762950. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBMA21881328.