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 0x1c57446979cab4642b2f40354281f8d271561e9fcb419e6dc443ee6bedad3512. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e35a457-6d34-411a-aa66-57896e511372.json and https://artists.proofprofile.net/proofs/artist/6e35a457-6d34-411a-aa66-57896e511372.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 0xbc2c2b17b8e60159fbb1a25e2e08c563056218d272958170fe2201c44626d44e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:13:26Z), 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/BCGN72400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8785c2922012251ddbd75c78a3307fbac24a1b0d353889863795ab7ac47856c. 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/BCGN72400005.
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 0xf13d8b8aa769a2a58e224ad8220c1dcb329fc218aeeb09dae0729296c6ffcb2e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BCGN72400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37927f1b89a2922b78fc734633bfa665550322b436c857b01d45a0698597f430. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/BCGN72400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fa77c0ccfd9d75066454540743140a2ff495681e29245314bbdf0f080c4a32. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BCGN72400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d88c4ade02796300b2632e9268528efdbbdce9efb3551add145691fc8be3584. 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/BCGN72300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151c01b690c3951291a9b6fedaeb767f96fe4f7113c40fd23a53e2623cfaf631. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BCGN72300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c05309cc480aced87f63293a899df92a35ce99322b9f136d38062252ab7f9e. 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/QZ5AB2369851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52d9c7a454299c477b6bc263485e8a21156cd9523ecda0e26e8b153e827faf1. 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/QZ5AB2369854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068eeebab488f0d29f8686515ee01a1833c0863a717e4c7459a09643bbf5e594. 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/QZ5AB2369857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8189e219bd314da37b45590ac7191ab612e026a3fc486d062b2134189b6eae6d. Chain 2 (Bitcoin): anchored in block 957212 (2026-07-08T18:33:44Z), 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/QZ5AB2369859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e8ac4f19339058c9569119e15eb260f7d2badda8889ebe3ab7a40112a4184c. 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/QZ5AB2369860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7708ae00bd68ef08ad332f201fbbecde9e894e3ba3d56c3dda3cf81971cb4b0a. 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/QZ5AB2369850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc4cb751ca1005d19880dbaed616e93db446dd0602279c1ffb04ba165b872de. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZ5AB2369852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa35b9dce66b09ae26dff4b4cfe95f79ea5c2e9dbb5083c4b52cd8a6d9ba4e33. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZ5AB2369853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fa55b5a81c5cc6c69f07c16421c9a5793007894e47b07cee20a8dcdb546ea5. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZ5AB2369855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ed10b3707c215bc2a381a6b1a6ae72e1264f8b0c348e45bd78200637eabc9b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZ5AB2369856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c00426c74d92056fc3927fd3214d71f6854d7d431e7b15dbaee7632df2328d3. 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/QZ5AB2369858.