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 0x2c8a48528140b91f0d98dbcd10fbec0aedf77e65f937c670228bde9dfb970cd7. 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/d3b344d2-4e29-47ca-ba1d-832f6259db56.json and https://artists.proofprofile.net/proofs/artist/d3b344d2-4e29-47ca-ba1d-832f6259db56.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 0x2437ec3322445d6c2f0cb3a326a72fc8cb3cf16468cb4c27c768302f3b070860. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/RUAGT2472540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ccf915d0fc6c32e17a092dc282d5039829838f44e869af98d2f2d24daa969b. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:39:32Z), 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/SMRUS0063987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8e0a33cf6fa8d53fb683de693546afdfc4bb93058b5458c5dc08157e4bae46. 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/SMRUS0064626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626a3e66a86c6b6a328a13588e6a22e7591e9e2905f0b01c7b34ab275ec6fe82. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SMRUS0073565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63477ce6ef1b4253faa316ed498510d787e4ea8a2a1b2d7e65b7247893cb1af. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/RUAGT2363312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d52c479dccc46519a4ad7c880b6ea77fea742f256a7b74febd4feacd302a425. Chain 2 (Bitcoin): anchored in block 959110 (2026-07-22T10:20:57Z), 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/SMRUS0076970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51d4149f8e47886de9ec4eac2ae44a27bed64c5280d0cfb67ddfe2af99ace63. 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/SMRUS0077233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d0faf51dff893a9869fd032fcb86178d5b2b50c663f22fa17763a4dbe0de4a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SMRUS0077311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335f1a5855d66610efcaf1564b913b278cf9472a0ff7ceade4242a3fa57525f1. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:40:25Z), 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/SMRUS0077372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa70427f3b9d21e02da966f661cfba478948eb9d44ab5abfb29cb90cf047e8fe. 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/RUA1D2483776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737a0a30d0269190e56c3f30a5de12c342f9dbbe14da1a2dfae2e532d4297eab. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/RUA1D2483778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d8101bf818d0485f44e4d4e4a43cb9a2fec09e3a05a0df12175f7783d868a0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/RUA1D2483780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c7e78ab8c98d26d47de211711659b0f6acd14b6e06c223be3f07e50bd60cf1. 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/RUAGT2400994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd773442ac8b50c6d049f91366540746e734ed23b26c59c94a0eda3f51eb377. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/RUAGT2447234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2a54f4e8f49422c22e79db02e1f7cd6c14d003d19c57d7492fd93e795a6f7a. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/RUA1D2516223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311610f5977e6af548aa7942c90248aca189fd2d19c50fc4b152587a8352739d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/RUAGT2523628.