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 0x99319a5cdb1f0a5e31bc55e3245d2295daa93362371779d6f78d8eb78df0cd02. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bc642ca-e292-4a56-a66c-4f1fa14b0110.json and https://artists.proofprofile.net/proofs/artist/1bc642ca-e292-4a56-a66c-4f1fa14b0110.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 0xaf0f482217ac3d353c972df14b887eec3cd4ac40747fdbecb1d920ecf15a5073. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/PLS281700208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb551fa1d58c45f5f21501ad9473d7fc875bf5f102ec8728047e62df0ed0865ec. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/PLI602100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15714d9f6fc9ae22216adb3f2a671e4c96be4d969f88ad54b34f142fe35fec44. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/PLF242211012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890fd3a629f91be398921ac2fbe834b0bb3fc19457159b094fd4505cec262ad9. 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/PLS281700251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab05b54b6e1376a01d2334ceb6ed15c0cade1459e8f1244901dbd5a71356519. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLS281600057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ba1b00c0092c8916bb844d5ed0076bc2daaa9b5688b3dcefa12ed5d1319864. 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/PLS281600038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f733f9cb225664e487f6c0c72a77e9fc49162ce474aa616ce3e5d87b1469ecc. 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/PLS281600063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a369cceb14c1251d9a46abea9f24cf103cd92e593e253df2cae3c1ab824309e. 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/PLS281600066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361c8d5f8f26b6e734d5690eb6c82cc4dfe5ae320c73740bf9087140858b386f. 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/PLS281600071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ba1b00c0092c8916bb844d5ed0076bc2daaa9b5688b3dcefa12ed5d1319864. 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/PLS281600038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf6ca2647337ecc2d47ecf86ad14f6deabb311f72fd4515266c2fd436a57159. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLS281700181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bccf7f1fa5c724b9bc422765b9cb09f59b8160b4f0202781488420ed9e335b. 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/PLS281600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131851b4cb62712aa958c1fa0d865c6c2af905d816b070b85b8b4496d079eed6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLS431700041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6657dbe464bf696392174845bf152c41f0be640d85bb45b922204008f28c071d. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/PLF241603071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee55848beebb2d53fce6058fdeae056ac671a61b95edaadb82b0f0c10a0007c4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLI361552160.