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 0x2674e573859d92d3e71ad8f0ca051eb6cc16c18a7331c6b04283572ddcdadc6d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4dbad70-ff65-458c-a815-5615bed9a0d8.json and https://artists.proofprofile.net/proofs/artist/e4dbad70-ff65-458c-a815-5615bed9a0d8.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 0x8461321c535a9f15a8820bf4da1838598b05ab224377adad6c03d30d55970c13. 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/NLD321900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201a8f5ab81d6f049fde3418359b1e799a5bd1c14260a3758d07ff936f6028e1. 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/NLD321900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc55c02edf49c5bd2188e24f44da283502a91e238bcf80c8659976120297f194. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NLD321900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeac5c5b073c6961fcf7a707181908f4e5756af853b013f790b2cd61bb493444. 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/NLD321900056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453ab32b83e32329d32a19752a9d187b74d6d2f82693e9f6f35eb7d13a7de3e9. 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/NLD321900057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f72c36e661285aa801fcb851623a631d1d54efb55e5a04b96d72d3931ba82f9. 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/NLD321900058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8461321c535a9f15a8820bf4da1838598b05ab224377adad6c03d30d55970c13. 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/NLD321900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f72c36e661285aa801fcb851623a631d1d54efb55e5a04b96d72d3931ba82f9. 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/NLD321900058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942ff17308ff851ef1cb6ae626c7db4169df9ee0cc45b2e708e2a4ff6370e68c. 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/NLD321900781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bffd6c7274a317d82cc6c3ce51c991a647b9577185eff95e357ba8af2783db. 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/NLD321900782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572ca9b4c9a29cae83703e088495fae9587ddd515ddb5d7cba5f2ba1ce25cd02. 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/NLD321900783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4314eeeb088b7a69bd9a1539e93f85546f27c3c389419f9057645df3135055. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:04:53Z), 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/NLD322200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b52fe9e12e9952923889c2962de51ad358c167f06a97114bd60a6edbd7ace9. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:40:37Z), 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/NLD322200180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef709b5bd721b6b8c9db5a350a519cb9deb577b1cd9634c462f80a5fdbc6084f. 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/NLD321800263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23ec01a1538388dbd4bd4f4c46427b7f4d0176ef89357ad2a1dec9c040baecd. 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/NLD322000238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae8c0d7fe5919baaf66a7d9e69bfa701b978b5bb57ee546398f4134713e1eed. 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/NLD322000245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0963abd67bf34528f6ffae0e4140280385ca44e32a7aeab18617e0d9af8455. 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/NLD322000216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd202ea5b9563488060257115a06f29adb0e1e43686823cba057c1cff20a32dda. 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/NLD322000173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87b7766c4955fd80df3ae8096eac53719188e3b828ce6e2639dd2494bd64a8c. 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/NLD322000218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff200c19a7571f1eb970c330075717e5e3e180339d6213e5c946ebd4130a4b4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NLD322000220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a403f2f7fa77d93a827c4f9699b4b10bfdf80db3a350d4745c101254d9ddd2. 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/NLD322000222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf098845cb9d32e52bb84c50af9cc49b812107fc91c0a84c8d6333ea115b3bdf. 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/NLD322000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e414517acbe22b03f8de230be32fceceb894e63993d32cf6633378359bcdf86. 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/NLD322000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841d36490ee41ce6732ff7b03ceb7ca7f053fb7563f104d40b30665120dd1b43. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/NLD322000005.