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 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 0x017504e9130ecfb0519cae866195b0e78ab368668a98b96e4376966cf61646aa. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7415d80-e168-4e9f-97d8-50d957ce5d75.json and https://artists.proofprofile.net/proofs/artist/f7415d80-e168-4e9f-97d8-50d957ce5d75.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 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 0xef1f0ca47c49749fe151fb80ba28fa10ffddca4312dd3c7871ac23278ff1a78b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GXD7V2435416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db6e3faa945305493fc774d668c6f2c30213eff9b9600993d67fd7d0b058d03. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GXD7V2422130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a18164506fff98b0f04bf150b227dec19b8ec3e58198850e3ad5d34e01c0f9. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GXD7G2236322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72f668acecd3df70bc4ebbe95b65ccdfe6928704d0e6248a88dae94907fcaa1. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GXD7G2273126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb1edfaa4cc17aa2b638322320b7d825ccc544da588207c661cab2beddb1b97. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GXD7G2261334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782e9280b2e84525bd576ee5d5b8031a7a594189149d496b20f559510561f1e8. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GXBAV2599545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde531fd879e3f8a1eab70f3a0ceede86de3cca74d2a194036503b538f0ffb71f. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GXD7V2561261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1206722fac425d10a6b88eef4fb058eceeaf058473e458c59bb5754e869bcb8a. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GXD7V2564935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade184743bbfd39e65aa4eba515163e22be7010ac5a126007953d62a953a90e2. 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/GXD7V2572190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa243b4feef84ae6aaa73d89fccf081b3c953e7d2d5a47243a0dc6e7ab2af5796. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GXD7V2583960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11ae96bfb8d6d125a06a642aff9703271529472066f8b4d7db5f2f7ba4745b7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GXD7V2533171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50092614e87364d6201306b0b7acedd19c647bd3685434ae5ec663ff032d938f. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/GXD7V2550181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af890c60a9fe96ad51b670e7a83198a8b9b58aca0933782d15e2dcbd61dcd86. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GXD7V2505534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb979ed328bcdf10f696f6576aa69e4487e4c9ee6d3fa995f067122c18b89ef84. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GXD7V2545341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd299df66204be9b1d4f169a957bd53c0490fc38a2ae49407e412ac70caabd36. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GXD7V2523175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e709cdc36731e5d0c426209788919da5edeaa3643dd60a320a3ccad461706c. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GXD7V2586673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736b59df2167e58b38137bd2901c94a0c542d98d0b7a0751a894806ad940064e. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GXD7V2526695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e296ce041863727448d3fb4970ab6b62e0b0d9ed638533727cacffb21f9a3e. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/GXD7V2576013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da9603c6681a0f27cbb750bc97a575e1b1bd2562f888389db0280a6606a6799. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GXD7V2581780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fcd66fe296f74b195ec6a6fa01857d5d718a8b07cff02a0f12e7964c2a06de. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GXD7V2508452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35906b5f3c6165fb4e165c7e6ef917eea8b8b9664069dff116eef46730243c3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GXD7V2541432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2aa695080fd5471a6e3efb95af57e54143791ccf6721127b5954f1079afcb2. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GXD7G2549457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e43a46b075bd2782fa259f79e65d99b97b1dca30bbc625b1d0b21f685dae2b9. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GXD7G2516076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e7911a57a5341aca862c635bcdc0c857536632397ac8642c52302d6e385086. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/GXD7G2514827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9aca11c295931caed468ed17e88788ebc1a8e80e56ad18093fe58d9ec6b5dc1. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/GXD7G2568986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5f3e4c96626f6dc90fbe198ceb0556b92432454f33d6ab465ab9715a53b235. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GXD7G2516358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649379ad97124228f81eee7a04371cc4388e12a9ae337977a5ac313c744fd939. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/SGW502540317.