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 0xf6c439820d00f3cc3bef8dc57ca44b1ddd2fbe5cbb61f790cff4f82836f38893. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51b3f318-a2e5-4158-b591-06937930c925.json and https://artists.proofprofile.net/proofs/artist/51b3f318-a2e5-4158-b591-06937930c925.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 0x118d8fbf1e0fbb9868e7fad769b709c1a0d9c73f4d2aac26f00c7c2534d2bfe1. 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/CBBUS2407001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2267722e82fcd2ab811659a85f23d3e2b34b7ebd2ab7823c090c419d6d508238. 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/CBBUS2407002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb318541ba1c3c3c95a95827a5740e2fab326d9db89698c08f9d7ef550f19ae92. 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/CBBUS2407003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d295762641bc54df8579df1a5d892931853691b20cfeb63cd0819e3daf1693e. 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/CBBUS2407004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5dac91dc830aa2cedd8e7f0aac38d9e47b2e92045cb60cb6a40b5baf3595bd. 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/CBBUS2407005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba29a776496ef543b36fa354285c563afe92e79946893a9aac11a52ef2d0697. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/CBBUS2407008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f10280a9bfc2febcadc8c6bd6a0c8ae6887ae081e4a287d71a64f1a0a41a82. 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/CBBUS2407009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1849ed3bc88177f2ab9c4e166d1c7679c07ae96f1601ff7390966ff91a662e32. 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/CBB8S2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c72eae1eac3edd2af9c946b9aa82c99962b04944de90ee32660f0a821330c77. 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/CBB8S2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9eb1010dd4304e180694034bf500bb15c10774e09c8dbf710da0604914b8c68. 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/CBB8S2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b127a8d4619c9d04539bcecf423d1da619f2b3fa009b35b503f92a573b4f65. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CBBUS2407006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffee6ae809b02e92c0e7504a8269a4e6edee87cd5c73a623351d2156d377a9ba. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/CBBUS2407007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263f0b395d865edf045373f56c18e3ec16dbd3b812f1676c9cfdd6c058a1aba5. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/CBBUS2407010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233885e281daf49ffb1da60770b4462de9d6403f8e20bb7605e19ae13dd6db8a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CBBUS2407011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586a58ad344c14910a4e3a70703135cb819f34144b6d157701a4ae7acc1e375d. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/CBBUS2407012.