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 0xf8a8ee1a7cab4b99ea68274afc9c6fb87231db565c6ebf41f0868d77fb7947e1. 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/1d6e41a9-6623-41e9-a4d2-24ac50b36ddc.json and https://artists.proofprofile.net/proofs/artist/1d6e41a9-6623-41e9-a4d2-24ac50b36ddc.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 0x553503fffd11e1f2ef786d4efa7e98c8763e9506b008f718ea058049b77d368e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SEVLW2208001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029bee13f98e3c74ccecff2748a4ba66b41d2a4e8b9c7bfe24f50c6afbf467fa. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/SEVLW2208004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8e42a4515dc81e676b1454f188e95b16c6222b5e684d4571f65b586cfeac09. 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/SEVLW2304002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264406b088402c5a22caf8fa6bc3f1b45f074ee66d14936827987e4a410047f8. 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/SEVLW2304001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f253362de77f5ab7b9ee73546b5b0e49fb08f6113181f0576e9c22f3657643. 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/SEVLW2304003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58565f15ffffc63bb7df6904053d3bf74e3ce10b26dfdc8c696832641352a02e. 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/SEVLW2304004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0f345842de8ebd9d925a9eb3bd210058360a94bd0ebba31ae3d3124737fc46. 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/SEVLW2304005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8738c09035ed45b3db3d55f92dc47a4dfd182b2bc04d657cc719e40de30d8c0b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SEVLW2315002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cf3dac7a6cb89c854b2a0385e5c14b0b4fd913f8244b3353aa48cc654d2c46. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:02:59Z), 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/SEVLW2315003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14da9a16c81c23ea102e44b6803b85d61372a71adef2b80bda5b246ebd00176. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/SEVLW2404005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1ff33f06674d93e8501be2b468c267d050613a9dcdc74cd45a83038eb02250. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/SEVLW2404006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21a8c794ccbd5527b6b05b226313fba225eadd1a4f949c021cfcae0c3762dd9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SEVLW2407003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93e4a83dc1f38452d26118ff9361c129bdd5f82832b2b6bec5331ce73234f8d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SEVLW2506006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8e42a4515dc81e676b1454f188e95b16c6222b5e684d4571f65b586cfeac09. 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/SEVLW2304002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0f345842de8ebd9d925a9eb3bd210058360a94bd0ebba31ae3d3124737fc46. 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/SEVLW2304005.