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 0x0d7d34b63027cee03f54a55168c67344c38d1774cebca335cc19b71ec662e5bf. 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/f334e7f3-1757-4081-95f9-a7e3e97eed73.json and https://artists.proofprofile.net/proofs/artist/f334e7f3-1757-4081-95f9-a7e3e97eed73.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 0xb2e1f026479549b40701a439518d128bbed27075147e4cc51953e9a27a61f4c1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM3DF2118615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c632c313b906311c2a306a313e80e849da3ebedece8edb2f3299f9591595ae. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QM3DF2118619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5387495dc7717c84ea10018180c55c2a62dd2ebedeaa93e3fd13aeb40c4df510. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T16:56:47Z), 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/QM3DF2118620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc690600bb27c1949cdbed8e8ffb9d932d1041b4bf5640cf694388bdf4ff25acb. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QM3DF2118277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcf68d2f5000598d4b265f17a9cc5c5416433ddee29f35c6b4b274d400c522d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM3DF2118288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361f84037d27946988c5753590bf12f0dabb37eb7dbcf43059011bdcefa97f61. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM3DF2118294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cb305292e5cb12e604c2e923f4a10a4a34fa4b4fe03c74264ca33b0d2114e1. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:56:32Z), 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/QM3DF2118299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567dabd2197295d18a5a411ebdd776cfa078cc234283617537c7c851c3b46635. 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/QM3DF2123933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b951a48dab3fb312abff24d7380f37f1285c82373745475b08f5ad44dd9c19. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QM3DF2123936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebbbb67b67a6a25389d1b4fa05cc08b496bb0705cc6f0837acd71193f0e73db. 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/QM3DF2123944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8aea8c993f717fd718c8771ceee11f61a8e8471770c3cb32c6daf53c4865f3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM3DF2117383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5108ff8cba45d87d56d81499ae898de239f4bf2fbdc49ac9b5c745d9f8a4c0. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:31:58Z), 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/QM3DF2123953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333fad0c040b54e875a7648ad1d026050fbb38eea1a48328da7400f1a1fa6d3b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:00:37Z), 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/QM3DF2123956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1007b3cd9763acb46b76e088e6c8e341b9142a8fa24bdda44a611198c2dc519b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM3DF2123957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4940b9c63be5281e3cf7234db6f50a9db9f5ec8e9a55b9a28e08f6f039f826. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:04:58Z), 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/QM3DF2123962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798a259d72662c146f57a94770996dad6005b183be4f86b1e2541e0c26086b98. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:24:00Z), 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/QZNFJ2119541.