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 0xf9b9b8051320c807e3722ff7e3c96c6835000fe7825554578c240163c8c64550. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d639a27-3400-424d-8474-711b67c5c567.json and https://artists.proofprofile.net/proofs/artist/9d639a27-3400-424d-8474-711b67c5c567.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 0xbc3596916e593cc65f5150b51b91d59800abd0d5da9e800863a3c9371f41cf0c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAHD2394933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e06ad430fe3043dd08fc9a5fcb6a30a96b7bfa9f2698e80e7a1cbc8eab72a5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HUA612402131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6875f65b76eb8121d9e24f74ed537ec18ec96c875d6f9650cb3d53e6ae010cbd. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/HUMAG2400357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfb97f1282fcfcba1f59ddfa81584539fada2f440d77843e45871efb40812ec. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/HUMAG2500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa123ced7fab7f71e7fd843702f089b7e6d44eff0f2f0d2733903600e6299300d. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:46:59Z), 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/HUMAG2500155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa492c8ebbd1b3f80bdb23f9b1c49a7d41b6444eb015798d57ba32a3c862508d3. 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/HUMAG2500374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68b6f9987046f68e944d85148a946fc55084a10654c90d25b48b52039e2c843. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HUMAG2500273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab98d813bcbcffa3516319d83345e8c1b041b07d2e9cf4e58cb42f41fb4d2ce. 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/HUMAG2500375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6875f65b76eb8121d9e24f74ed537ec18ec96c875d6f9650cb3d53e6ae010cbd. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/HUMAG2400357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a38ffc693dbb02fa0509b1f1c5680500fc9d7f96a285d9fe454056696658c36. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/HUMAG2500376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693f53d1ba17dfdece277b4b3a981d984f8f6950a864fa21736db8795d680133. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:38:57Z), 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/HUMAG2500200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687ca9890927dfe2c31700031347b04ce684c5ec6bc01501c39b556e9e363322. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:44:30Z), 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/HUMAG2500377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9b980dbca5c67756d978fe363560e2a2fea8200820f12b40b065862fb4a826. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:36:26Z), 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/HUMAG2500378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918eae6432e834e587c7768b2c5c217ed0ffeae4ef1f398467c633ceb1fbd6b0. 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/HUMAG2500379.