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 0x7c10854a0d3c9850e41877fb32bff2022aa1a7fff1fc512f20b8e8b680ee0eac. 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/66401f8d-1d7e-438b-b09a-a9e2674f0b9b.json and https://artists.proofprofile.net/proofs/artist/66401f8d-1d7e-438b-b09a-a9e2674f0b9b.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 0x6ab84313581f7b7165d75d1fa7fa87ceb23a7bcbab3de9dac4ba1ddd7eab30d6. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNWT2040851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd134be7ecd5b79bdf3c833bdfdaafec460bf7c735bdcb80e619a4a8957f04615. 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/QZES62095430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d0350760eb3c0ebc24c8740b9fa0f272b14f49d16e38fee0e871d2acfa217a. 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/QZNWT2040852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ccca4602c9af0fbab227a561217a9b872b9dfbe4ec71edb579c8cd97b218d1. 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/QZNWT2039088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cefc0fe259a28b1e624b76364ed9616c039038349418ac6a2f61df712154f6. 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/QZNWT2040853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4f03248627d73fdc00dd3e6c76da01525120a7daf45feb652bcdcae5d9d811. 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/QZDA82023612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64c4fcffdc8c8f3608b87180dd171fc9e64db484e6b99fa44aff424755bcb28. 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/QZNWT2040854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c10129a69dcad9c461bc456b121c6f4ab4328a0624806001dfe2d5a706f36bd. 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/QZNWT2040855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa115b815ebbc43489a6fe1f4189c9ca74000e8e42d8cea7fd96e992bec4c2db1. 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/QZNWT2040856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d85b01f6ae25493816182e18f4c839c75fb93528bc1b58e3b8b95176e4ed03. 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/QZNWT2040857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53d2a3e52f692820258fa5cc43bdb0056a3269c6fcabdf9c3806e4a662d008c. 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/QZTB72312007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc9158dcb43938fa9ada868188ef8018822e621eb1892515da9d8c6ce3a0485. 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/QZTB72310068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780562f6194d6a4fa28cef6fbc7a027bfc87fe50da5ba6772bad960aa6c9dc4e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTB22331984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49595687f1e505b67799678e871eacb49d7736d3ee0a8388151bfe76d8f6b21a. 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/QZNWR2390547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4733a1c6c8511d70f6216ad49c4eb72c82a8157f1fdd97afad593e8d3e48adb3. 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/QZFZ72347963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e770caa486a74b2a0242840d3756aae4a7525c8fb11f72bcb9bceac341d01b. 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/QZRP42225946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71df4369d768307a0519e6db11db3123592a2b6afea83ef4c175cdf107a9f5f2. 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/QZFZ32259801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fb17ea22ca709a63763b66046514b35f6d8789a3917561fa66ad54b4d259c6. 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/QZFZ42202975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe09b0fe8623f0ec9a3180243836791eca7025333e9fedde3bd2e54398fb7496. 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/QZFYZ2261555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0cb4687746ecc3c8aa0b30feb0978308020b584dd7bc1a049b6c379af4bed7. 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/QZRP52181732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f76f8fc5330eaded8a683c4eecd901e71549411bc4558be26cc6d9bd69ffd2. 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/QZNWT2156468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ccca4602c9af0fbab227a561217a9b872b9dfbe4ec71edb579c8cd97b218d1. 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/QZNWT2039088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd134be7ecd5b79bdf3c833bdfdaafec460bf7c735bdcb80e619a4a8957f04615. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES62095430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4f03248627d73fdc00dd3e6c76da01525120a7daf45feb652bcdcae5d9d811. 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/QZDA82023612.