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 0x291c0d7eece704ee668f4935f90d99323ed2f40c014536b80b8d182d86b4c10d. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a7d88d9-34d8-4551-8b5b-6d0b35752de1.json and https://artists.proofprofile.net/proofs/artist/7a7d88d9-34d8-4551-8b5b-6d0b35752de1.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 0x02616256637b1c2da64762a640ab1578d906c1521ef996ab9d674066b0b6a43d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLSB72300166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa46fb157f2094f5fe9171a9b5ce9d76a487405c2860bbba4bd985785c32e2cc. 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/NLSB72300168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd78ac2435996ca29bffa35e6edb218e9ced7fb01a240ae66662647a30bcfb4e. 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/NLSB72201712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba0ff3b87386815162837a435a6b20750156299a9be8802e52b5297946a3fb2. 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/NLSB72300173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784913d5723135b456b56791ca6c30846f459ea1371423272d98e6bd4a1450c2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NLSB72300167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029deec1df03fc4172d51355f533dfcf71899f145db1a8f1ce65e5a1fa093286. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/NLSB72300169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caaa03a2d9f31cee3c59aa0ef43663b0366eca440fc1f157b74c24f2d649245. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLSB72300170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3eb9f16696309464be251eb67eeea1351e2a544af5f5499186d5515d6eb217. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLSB72300171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700b45ca10ab8c5a46c6a385a27e58e4b96837075f618f9a950872de2d67f56b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NLSB72300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0c3f559c9fb33387cdf7daa217931dc01ab5fb30782c5277faa1fefab14631. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/NLSB72201711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c1cf49d522a305a0a7e16a887ed656fd9d89b67eae51872485625105548f19. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/NLSB72300174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab2dc6f814a29d7e7546f59b1a2847305aa4b6edd2d10e400915c0f95c9e207. 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/NL9FG2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24f46d4f3e9c0879d9b09429ff9576f5c085510ea2287e4e3c631c99228878a. 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/NL9FG2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221db2375514db5b7ddcb4f82760476f203bfd3ecdcf988a8705481372f22df5. 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/NL9FG2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b64b59484b7cf263ea4186e2ada5b5336db52912d81f98446f5e22e160d9488. 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/NL9FG2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98de557f1fe3d8c2c54bb084be162d0f89514fafd1decaaf6fe5eaa3b3f0086d. 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/NL9FG2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac957938bbe2ff056557ef68975273b8b5eb15fc47ccf3ad8acf59b5d686bb57. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL9FG2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49057898a0ca4acd6257547d379d8fae4dd7d37a72cbe3797f112ae465fbc5b6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NL9FG2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039f5488aa165868daf0e0aa01d00676f084ea20125432b5bca0efeb708509ab. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/NL9FG2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd41e32acee91923eb6eaea0bb1097de8711fb5163134d0d767b773dcfe1181. 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/QM7282198839.