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 0xceabfb919859649c8b843df5f8c1c90bd5f7a1fc3410c61a4a26b0ab3f0f7003. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10d567eb-a63f-4233-a718-46c4573e3c12.json and https://artists.proofprofile.net/proofs/artist/10d567eb-a63f-4233-a718-46c4573e3c12.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 0xb1a9e6f1cf14a2f7c061b0fa98425e4065c41b0859f43db043f2ed5c710cde90. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:26:28Z), 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/QZZ7V2428727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3785f590e00976f51030b6cee89eada0278e4fc25ff15ea2cdf2fbacb20ab8b6. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ7V2437746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fec2f0e2f4cce2ac97cb1d4c62112dcdae6904882e73726437c416875175d9. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:24:05Z), 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/QZZ7V2437751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f280d584c12545174477e099a806c299bc9c6a4b66cf6b041401ab7e47d67ed. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ7V2437734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c1f9a2bf7249de46d051607c04e43767e39b4b2ab1f1df148e46f0718e8efa. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7V2435423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1661a9c94b5ecdaa8f690a8db5a963b313041580490220eda71a94746bbfb7b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ7V2435420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e50ef9c5abc00513c41ccf956230b647687195035b6e856c6a486e6dd072b9. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/QZZ7V2437750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02e12bedd2d13cda61a81b8572601b00fd50efc8c60e9f47e4de279dc637dba. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7V2437748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e878615902965d9923c3412e9db0b07b0dd7291c1bb5fc435393d7c323ba26. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:23:55Z), 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/QZZ7V2437754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8bb37635f7e1dc67f621d3034f6bff57d575c477a8dcaeebf4e261c6781b2e. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ7V2437757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38a3c4f11c2f8748d6cde642811fe4fdb4d6c49bdccf4b0a58f732a18739349. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:01:50Z), 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/QZZ7V2437744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b02c200be30a49ef81fc3420e012d6910f0153beba47b6b5f3114051269271. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7V2435419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635585315891d5d952e249f6661f09e724a07bb83fdc7896a42caa915c43ad6a. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/QZZ7V2437743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771c203743dc20cea4f8a9512cb9a51d6c2e2f342dfbdce84c94193c97e19688. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7V2437753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2754b214bae7f2a098ea35285d7f82ca8c126b8e25af2b659ba4e28265e9371. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ7V2437731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2988d3c213f265ad9629ef9c8fa7e2c0d5f536fb845e514c1d0b48bbc9a76e. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ7V2437752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f892acc63e46c68dc9b93e870433ec2ffeb4400b430b9280dc7d4744ead5e2. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ7V2435417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ca657819216897c75d4ec30c5510eb899eb65d03be523e86eaa0491e830d0e. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ7V2437728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7683bae72c48e15ca16416113ec57d966d2f34f3c49ce183de3d5312977678. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7V2435424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c208e2726c861eb1a560c9e0f8eef6f34e368ac7bbc3476769fbffff5dac4c0. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/QZZ7V2437749.