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 0x3cc6f6338f41acf67593fff9a7170f716cbb1b5cdc04be2083c3c0e6db7e0d7b. 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/bb8480f4-2e85-4d88-a4ec-d2561b7a3279.json and https://artists.proofprofile.net/proofs/artist/bb8480f4-2e85-4d88-a4ec-d2561b7a3279.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 0x655af05dfef13831475f13c55ba9c89591a6344841b76592837464f2708c39c7. 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/USANG2441509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670e1a14c0030231c6be1533cbf14940ab7ca376c87b2b62311faaaf3ec90b60. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USANG2405087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455ac03da779419ea3dd48a2fb1a6e1c29d4c2373e79c558b6ab20ebe14e39c0. 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/US3DF2514063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2513509f0b2a8816510693bda224fe68250c7fcdecb5d18033d37a7a97c7542. 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/US3DF2500297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd00309da76bab2f357e0482157ca42e4ec6430df40c9c0874a078de368e05ee. 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/USANG2496589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d1837ca06d39a21c9103472a28db96c4b67baf5b9fa6f09e1e48bee792fdbf. 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/USANG2465023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a509ec3d7d9425d84b7fb7d2b59e1187ee9ee1e37c01a9f23d7634cc4a964a. 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/US3DF2469837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b9a9c817f1ab7275fb7dd89c4c4d93c6d42e46a93d0ff0242b13cbbbba4b50. 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/UKZGC2400494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72d591528f125ee9a29107898b4c7cf02bb8f2015845eacaa80d77d9b8ce598. 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/QM3DF2422487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63588f68ddc4d549e5fcb9bd73ef381ecbdfe7f95ad69fa5baa6ccda9c4d67f1. 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/QMANG2235818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846070b460543284661227510f8f19d6b114157ae1cb72da6d046c2d97ed78a8. 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/QM3DF2296745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573ae4e13255be8477c2b3fcbee01a953afeed4b9ea64dfc15825975c3fda8a1. 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/US3DF2277536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cffcabea50ec618ea686fe36477191f1ab3aa0269a963735ffbcd75e1e12fd. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:26:59Z), 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/US3DF2277540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9527da8f049b52e916891de3d7719fc6bfc088e6448c0aaae1d5d9fddfa59c60. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/US3DF2277543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94d08c289a0a453feec1f2a3ffa8c679dec11520b639746ad189d9c1fc25a97. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US3DF2277549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41af9353352935a90664ca1e6630e96bb93c47532401e9b4badbe8fc3459958. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/US3DF2277552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616059ac71fb0ca638bd58fab9dfee362d6adbfc6df3a01bcaad4a0f037ab5d9. 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/US3DF2437732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fa6ab95210fde6fcf12cf2e75ffba519ef30cf7159b34c42e4e07a67369377. 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/QMANG2238640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edf33dba3124220a1e022072bfa02b78ed47ec2f2ae7fe17c4e184501f93aaf. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/US3DF2220007.