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 0x6a08b747ed2b02fbe70000c78bb03a14cc5dfbfd19980b2072f9854cfb10abd6. 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/945c1a9e-cc79-4680-be07-9ecb4de27380.json and https://artists.proofprofile.net/proofs/artist/945c1a9e-cc79-4680-be07-9ecb4de27380.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 0x0c73f8354b6fc2b0e0d728f4d1f77ae245ce2a20cda0d98641c9de807ad8f28d. 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/NLG662000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9cd185296d33ed1cdae880c971c01f523b8e3e4fc10d8671806d294c1fe5c2. 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/NLG662000404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487189952032ec51c68197de760e3b9d2fc3bf0afb5677d1d5988f54424e7e29. 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/NLG662000407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc350fbaeec11eae227c820a6415db2414e46dfc300e21ce251123ea487dd38a7. 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/NLG662100165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513cb23446274db98b316b1e67d0dfd328aa85ee27cab560bf9c315cea1a8bb6. 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/NLG662100317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c0cdd3952417c332dbecb2020dc2262b4fed2698d75d8bdee8cb10b7706d6e. 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/NLG662000176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4034fe486219f87d1c4b4eb28eb5322ea74e2e0a68fdbb335a8d91f02241457b. 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/TCAHN2395924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ff4693a569dc6461ad723fe50ba1cb339974f7674929d535778c91701d8623. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM4TX2330439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b39c8cada10ac3713ad2747e79174e291df1f1f3fcb2494f1bf08755fb3d11. 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/NL5MF2101243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0031db5e4ace4deb409e1338d50500a09c9c55f337543bb02bb78e06b44a61. 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/NL5MF2101079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298a79617403054ccb306fd6f40fe5a84a9ecf3317e560e4462883ba8d6ff7f7. 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/NL5MF2100819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae64bb1b349aaeb987d0086327536b2a8b9952105e9010ed8c306e84c893a0b. 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/NL5MF2100816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9ddfeee87f4b9eaa37ee4de898572a78a8a96b28665af0c4d446035dd1e682. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN32140375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc350fbaeec11eae227c820a6415db2414e46dfc300e21ce251123ea487dd38a7. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/NLG662100165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55092b3444bc78a2f550bc880f7bab0c3ae7019b35152faf05bcb37f72b05d4. 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/TCAFH2002368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e75fac22cd7981596b3df1b1f38ed97d6561a811ef0e32c107b5afadff56327. 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/NLG662000780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c0cdd3952417c332dbecb2020dc2262b4fed2698d75d8bdee8cb10b7706d6e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLG662000176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628372a1c5d964924b55e5b39aff715fe5dd9acaabc5d9e2943101c4a6ef0c50. 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/NLG662000177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa15682a1ae3fbc6f147284a64e740367cf7d78db0a62f468c7156d2ec9a1e0. 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/NLG662000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb451c0bce8cf691c2e20a9d7906b9cf6bbcd1c09630a722edfc7ed5eba74e0. 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/NLG661901116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e9f48a0820c42023b2d08b5937d31cf0d83b6bb149861b24aaec43acfe4973. 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/NLG661900877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9ba071f4739f34c5eeb2ea88eec140e9c9ee3ddbb5a05693b993ca35a81473. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLG661900704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf2d28c3707a6311844c48f017454a6b7dbd81f4034aff970633a5443a5bba9. 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/NLG661900577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff1fc1fc94956d119ae0ecaeef14b9111df7b8d96cb890c652c1a7893bdfd63. 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/NLG661900466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38c107c3243b0d102f07b7370b3f0d91150c983d5afb11d930f1ecc649d95c4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLG661900467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15dbad0ea8fd8c7394c2029cd8fcad17fe1cc4af57754277ebfea4fb0b662e5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLG661900263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2b4c7c49814716cb3997f1a29abae68bd7a039109db616e4f08b6531067429. 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/NLG661900264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80600c117b90d9dfa7c7361c35a57d6ab8c3a9bc0f3fb0b036415cdf3a536ad6. 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/NLG661900200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a10f3212764013d782bafe2c1db78815c49d3b91d3fedeb026bd632183a55d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ8LD1985744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce2e19145ce57deba99ee84a00e3b22392f6b5b919a6fa6de5b5d3687676a89. 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/QZES81857024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621cca36154edc189b02358a1ef1c66c5c58bfab17274f2414b1bcbb45e260fd. 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/QZES71842333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0570013b576e7e9fe7c8844d3b807a623a3c9dbb5b58059c0949c7267eb58ef8. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/CH6541824667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667b5530326fe25242b5fca9ef9d560bcf1398251392e1573a64bc04a552c794. 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/CH6541768424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66e3eab64b7f149785ec0e79ce3bee76bdf4c7211c94f36e8f7c3b743d99ab0. 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/CH6541752888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e19631e978b312657133356a58269d65a7180e79567588d3f45a69c58f2665. 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/CH6541741677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc099e35cda5bfc32ca3df87ed4d57ebd03443f13f4d4e8ae3a4879bd5c9fdf3. 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/NLG661900117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd221558df613903335fe70952af9fe3fb28a5184f4435e7661b756c60086d7. 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/NLG661900447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d3bfc53ea6a5aa09f271f722bc1ab39e6f2565627dd4e08a028b98d060b3ba. 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/TCAHG2385023.