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 0x52cdcf94f77ad448df6a7c0860df3449782cfdcb5d64cbcce50b9e7437d3980d. 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/0008a874-668e-448d-9c43-abfb9cd1a923.json and https://artists.proofprofile.net/proofs/artist/0008a874-668e-448d-9c43-abfb9cd1a923.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 0x9ef26b037606b15ccdb5ea4e40c64ac9445dee305c4d84e81251b1c09e9af646. 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/QZMEM2401608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e90cbf640d37bd882308bf7ff1490ede607d815b2b032a2f49a123996475ad. 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/QZMEM2401609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04b965114cdcb02db3eba973c5468f6d9c7863af2196d9c497ea26d9afe6d56. 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/QZMEM2401610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f08f33549ddbff76d432184dc7d5a879eab990e5ef27c667b8f6fc0faf43817. 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/QZMEM2401611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d39e6307b1e4f56e5d627f6b1208a54691a4880e45533281dce75f6cc3b51d5. 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/QZMEM2401612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7435a6568d23c80f49ccfd0e76b03930eda89ff4c02ab3166eb0d524696d058. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEM2401613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf42308118cfc15d8213e99bf78d4e7fc4148ba5c69297b14b76e63d1517fe6. 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/QZMEM2401614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dacef363e8445139fa6a1e943d2450c44e29c30f70f442d83394d20358223e9. 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/QZMEM2401615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e0e99ce0b911d139e4bdeb6aa7ec5a65cae81f36f2b11eb5c2e25bfe154e19. 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/QZWFM2407546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf165c0ca535269865c4c16dc9e3d6495352ebbb61ce040b538a28ba883fd8974. 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/QZTBC2401276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f20d2b88bd4b6a2e5edeab92197a13e92d18c3dd920e03f31764e19f678ba4f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTB32450977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769ce28ff933c728fae6748c02491c1c36cba3d89cecd1d9a4404dbf1bd71c41. 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/QZRP42494264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa714702172a533bc64bb4dca96d6254c9f37b9cbd188d58be2cea38cf89d3f84. 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/QZTB72346009.