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 0xc350830a121a821348a399b5d0a376e6ad9d8839a701d117b5f0100c641516cc. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6c12868-2ce1-4b6a-bd88-c1b07df2371c.json and https://artists.proofprofile.net/proofs/artist/d6c12868-2ce1-4b6a-bd88-c1b07df2371c.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 0x92d786f33cc37e2cb16c1409c402276cd5dea9deb173e78f0e778acdb5b84d5a. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/HKE022371155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cef9fc57f4f956e67fcb7cfac30199c00a1ab69944be2cdeb4894395d7eafb1. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/HKE022371156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595b84b2ecfb1d1bfd1eeba596216285b531b2838afee15fe377a78ecd516c6f. 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/HKE022371157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051deed9a3d04a9315a1c919860c054e61861f320be0af8bd8a9dd64f894a790. 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/HKE022371158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9fe8736fc6631c72e6d79a66b2932e80cec60614d5d720d89703e9d983bb75. 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/HKE022371159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7f782ebe01f6cfd9c9b92cb13ef3dc113fe983e83be8590cd0671def71ce08. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/HKE022371160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dd0764d88bdea1c1023f5aeff939ea763f46894ec609702059e20c024091a2. 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/HKE022371161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f19f1b4ff769431a0501e644a14648e547025e8fc3a970c0e5fd0ed2c748a8. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:44:53Z), 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/HKE022371162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14de5c486ec1351126af3deff2c5f12ad1c1334f6449b6b2d2877740aeb5655. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:38:07Z), 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/HKE022371163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0d3768bd3b668b9f8af0916e7c412809e2f8e6fa148e2aba925acabceccaf4. 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/HKE022371164.