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 0x89b08a91af6c85d42997267ca4901a3c412d457d3e3c373c5607227c6d4f1e3b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57dd5ae8-5691-4dfd-a731-476070a1e44b.json and https://artists.proofprofile.net/proofs/artist/57dd5ae8-5691-4dfd-a731-476070a1e44b.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 0xe6490d346277899d453f2c3fc1e64740e86591d8991dddbf42d456c16c63ac65. 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/CH6542384913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d78301e964a3bb4fc15e76a1afc7ebd1b4b5b7d2a293c267882f2c297feb30. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH6542384915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e2544580692951ef12bdc695896be54b01a2cb5663e6220df3fa89a25ae382. 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/CH6542384916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5754ae6b5fb4b85f46de80fdd67aeaf802e7eeddbad5d246303aa60ae9ecf1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CH6542384918.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebdb3707c3958c9cc1a18eabbe4e1269fceedcc49b50a5b396c7e1b2a23025e. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CH6542384919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2b83d548a8c17f936cfa7dd9be505a36b47ff68b3066cf42a2fb8edb37ec7d. 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/TCAEL1941066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9936f46b5e6c4e6dbfd10b38a61c35bf398471c68a7730eb2db936db4a452fd. 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/TCAEL1941078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33d0fd8862cb56d18d2e40316977af2e073d9b256f75bdf5b803b2a8cd4d388. 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/TCAEL1941087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539d36c1ac3f8f5e526cd6dd08e76a2f3de4fb71acc2b2b8a943f08e061e7862. 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/TCAEL1941095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4349b57b241b071a760544f3683a6f947151ea59599afdf20f4099dda9c9c623. 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/TCAEL1941109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa197fc87e126d2e6b7a13b15633f8f6832e806b16e556ec2f41cc2e09aaa8a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAEL1941112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85debee059fcce86aac4fc35160541fce6d9519d9aeda9bf9e8eb1d79b682a19. 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/TCAEL1941132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc918a7ecc0d1574aaa2c8adc8a210fe07ccf8b6ed2006bb06f056150a364cb5f. 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/TCAEL1941217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b4760ff16b4a1c3e71a8cb20454f4d3553aec543ecbd43d6f78ed5a9b88c11. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAEL1941225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae77133370777e46ce9e1664b798cc2510c746fae76e0d30914d96776541bcc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAEL1941242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87610ca32138a1993025cf1032994d936fb88745b4f8abfbd3b4d09ff0e12b86. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJY2109320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff1d5c9e800bb08f653eb7332e85b4493fb283acfff46760bc3672d5d6370b6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:54:12Z), 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/QZNJY2109322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2712c3a7a9795bb54066af1c0524cb9d9eaa390282b9bbcff44d44f12b8aaf. 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/QZNJY2109323.