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 0x7cf4f6c1f5a4b1a8be014581844f64f13a37e6b988903af190fa070666cf597a. 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/eb685fd2-f066-4582-a7a7-d6ef6afcaca0.json and https://artists.proofprofile.net/proofs/artist/eb685fd2-f066-4582-a7a7-d6ef6afcaca0.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 0xc49d2ff63bc5e86809138b212d261c1ac69e57ef02ce6b017c65d265b2dd927f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/EGA019002778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bb643aa85a0b1b7eded40ca8d45eaaf47079d93eed4fdabc17ab83c970c1fb. 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/EGA019002779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10c78df8397ecb2f77dab891637a79c6b8b110085e067e3791ab02170a79d3b. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/EGA019002782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31dfdca5e6ea175609d2ed0226ff26d052bbfe9e850ca29167dfff2809b1f2e1. 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/EGA019002785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa6eaf8141f95cb81925e2ec2f5b0f3f2f655f990488ef4f53465b975077097. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/EGA019002787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ad2f178bc7049de00cdce946d86906661db2df3490296baf7882e170dc5258. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/EGA019002788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188e7930518c3a05b9d80b7d4acbe18e253ee8996fc3ab0f692ebcae4214e91e. 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/AEA141401567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94bc2d497913689f7a13a52217d424a33bc33af07fb658d4435dd612fd69435. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/AEA141401528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdf5a3a4e5132f153adcb7d5ed266812449986bbc2f9798cfba096906cdec4a. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/AEA141401530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a86dbfd375ac7a718721926d4fca6c3b802e9de1309a864b2aff25b74a15ee. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/AEA141401537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917c9496470f8538b1fdefc1a43ef5d57414d5914eeffbd15ffdc5e6ea777630. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/AEA141401540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7939be80a3350d099265b113c6947edcf272f8fd8c97d2bb1d1c43f006a1a38c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/EGA010523821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4837e32cf4b143f4eb30e50725db0e739bfc6b34012f4ebee6dd34e195b1c1. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/EGA1K1910866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e71ded116b3acb73fa0383444382bca274dcbe9f83e9ff9483ab3e147470ae3. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/EGA1K1910869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98046f756c3b61d34c40f5f7f12550209719e22e50ca1fe7cab83229c6e210ac. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/EGA1K1910876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac2c34e1f9e8563f4537d702308f987eea595c7e26f4085d3197092046c7265. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/AEA142200479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6641cff2017639a0ec83cf52a1e78e2afdc0eb5e5b4a82d021f2a933b2b6a13c. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/AEA142213357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a7feb533067407c368b3513318edca42d27a52a85a3a236ee56ffb7494bd89. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/EGA1K2403108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ff27734cb7a7d471f07be76f90d61b2907432da6909bd3259d4f7df2c1bc67. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/EGA1K2401219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00da36438fa17364242457baa82719ebb9bd4fb522bd0216ed87adc99c2c9d3. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/EGA1K2401635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00da36438fa17364242457baa82719ebb9bd4fb522bd0216ed87adc99c2c9d3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/EGA1K2401635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0f1f16dce9a9f9f2ff36e098c79650cacef36f7f892729ab0a486e274d42ff. 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/EGA1K2402367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199025748c38592d3dc0392bee15bb3722492384b9ed103e8910d0954fddd600. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/EGA1K2402894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb811e612650beeaefc2ad7773469dd634d956fb0de4721b3151126e294bccc1e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/EGA1K2500515.