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 0xcc918c01986c8efc9e2f25efc1423161ae8b482367b54a0e8ba4e3cd532bea4f. 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/695d2360-3495-44c7-8480-7f7e5d732ba1.json and https://artists.proofprofile.net/proofs/artist/695d2360-3495-44c7-8480-7f7e5d732ba1.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 0x1318f997ed0d08095ea294aca8b81eab07898fd2f06ff0f15d153ce98c0adc8f. 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/GBKQU2111863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc87be2dd086d5398e4c0221a6b62ebd7ffcfdec58e3c791712145380730a0a. 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/GBKQU2111864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe054ab723dba27360c722255105800130c62d7132db30320628484e72231bd32. 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/GBKQU2111866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a801dab6b78092f1e7ff0cf01d2d2f4ac146d513fe31982c68b93093d4bfd2a. 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/GBKQU2111867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2d9d52f85051c6415245ae4d0c0d17e99236d86bd97fc5ee94c9cee5eb308e. 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/US83Z2209328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa8d0ad5ecc33644b9850f546d23724e2f8ce4176a3b811c0faadc30aee8e95. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:02:20Z), 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/US83Z2303802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f4ed0c384b73e84aea5d4a6e485c364e6f6b67d56f9234292984b84dbc7f4c. 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/CH6542501549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70eaa48db7d74807d3aa52bee5da0afd7914e148b4162ebf5f1cae178475c15. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CH6542538367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985ed608fd262f8638f24dd2d1fe10f019da3f5ddcf333a5430740efb63ace76. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/CH6542546734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffff60bfe719b0812ec3ccfa02f077f1cda8c2b650d66c0687d2e7ba0ac3a9e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR9W12239932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabd2141338ef65eab52688c8d7bb7e23442097716500b0afb61ee465ebe260f. 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/FR9W12239933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4e6b30e0e0d64be3c67f25097c6e39c48a11d6f0902b509ce9a9c7be751982. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADQ1809658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d6cc6223ac9e15dcecd1d3db50a8d8674242284ddb74682a5c4b3859c7b25f. 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/TCADQ1809662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf1b14482f04a19e7a31e38d57416a7ba4c2f81d8eba334084a8b65c1c8531f. 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/TCADQ1809670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39957876127699dc6a72e17b6cc6213107bcb38dd8791ad0880eca670be1dba9. 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/TCADQ1809673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347123495e91e9ea1046e1ad1a95c6c060cedc8cd983b0302275be2c38c790dd. 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/US83Z2232764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347123495e91e9ea1046e1ad1a95c6c060cedc8cd983b0302275be2c38c790dd. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/US83Z2232764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4e6b30e0e0d64be3c67f25097c6e39c48a11d6f0902b509ce9a9c7be751982. 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/TCADQ1809658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd4a5cb26abae620f7e85c702e246f81e684f0e8034056aa87d2fa80f0a3c19. 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/TCAFS2120060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a84278fce2f28b51c485e7844b321b6bb84841f7f93fc1d0abdfc9ab90a6cb6. 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/QZTV32455820.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad478de712700fc8b89c3b59bad16b28fedc131fc71c4ee0b78429e684d578f9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US83Z2023858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bc4277483891ada988074c34f2e533df63f4d82bcc71b692938af41e8bbf38. 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/QM4TW2168425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da7722d4f844ebbe9d0c9fe469f857af715151abd9111a7f324e0a4b3bc6535. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBKQU2043654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37795112088007e925946d6c79592f13d3168f6d86989a5771fdbab4d5b7f96a. 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/US83Z2028641.