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 0x45e759535dab4d38b6df8008c1ef1474e3573b9fd06007fbdd46c0ff2915964b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf0a6d03-77b4-4b2d-aac3-e5bf9b38c26b.json and https://artists.proofprofile.net/proofs/artist/bf0a6d03-77b4-4b2d-aac3-e5bf9b38c26b.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 0xb8b7e9dda63fa5998e4f74652df6611a7f3861d6b9197c7726d357b3821abc26. 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/GBSMU7265027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b94a510035d6f5c33c02212176ef93a7314cac5e61ca59010ea07f2c60a28c. 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/GBSMU7265028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1e30bfea7ded949f5219495cfc87fd9c59add4c76b0da01a7fcdecdc1e2702. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBSMU7265029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67cd095aa03a13400e0243f2d7d1b12f4a5dd10fa5bbabf61ea17b1321c1513. 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/GBSMU7265030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e237443bf40bcad9d842048c077918d5dc28a75b0b65e313190a3186b484d4. 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/GBSMU7265032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6fc601955a7bdce103da162c9291fc86d61ef868a73353da1a50659eafcce7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBSMU7265033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9944a258a174a1ea078241b87beb37c40307731aed1ba1ed43bb8998dcdf4f. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/GBSMU7265035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda83e0ebfd9eeaaedf81915da928874509b17a81307bb241c30422e449a0b01. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GBSMU7265037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0a5addf4bc15260c781cda313306bf65249023edaa7e8af51fe342fa0d786e. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBSMU7265039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8043242e121f7121569e81135e91d9b77e8d519b92d9d9db42642cdc560f008e. 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/GBSMU7265216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbbf4c90e04fd21dc4b02bcaec496703256228b7135345390280e9e3be37791. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/GBSMU7265217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6dbf8937a69691582f1a029321cebe7d993e19b3d46feeea91800b58376042. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBSMU7265218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe859596ccfccf46b058de517eac14ae8c4f77af2293d289742e034bf25e320e8. 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/GBSMU7265220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0455b8b68b04553c099c5e96613a49fb2756e7134d6b221c745a122ee3a179d. 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/GBSMU7265221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95148a3cf2ff64bc269324e33989ac03bd99da60984d0e6ff73c1fe441921ef8. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/GBSMU7265223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bd9ebbf793e2f9efcb8592af555ce4ecc6eab7c7b4bc7d773ab1cdfe6e21f9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBSMU7265226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ad51e5a36bfd9496b687e69921841d744c7c374c33b2137de6c77e7db1f0d5. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/GBSMU7265228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39fbb8e06ecda56414e699b704e44c8462f83c5b4bb3bde6005638fc70af952. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GBSMU7265229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd66eb5f9d3532e94353adc8af818e27a89467da80274ad77cae5ff8ff0bb8d. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBSMU7265230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59db2ec831d9674db763b6b4043926b2e585268f2576224f5245dc9ef59febde. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/GBSMU7259887.