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 0xdf5e00908d78b5a626833ed5268a207891a36b5e2e721df3674a6768ec25ed38. 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/be843be7-8147-4274-90b9-7818b9e2a85e.json and https://artists.proofprofile.net/proofs/artist/be843be7-8147-4274-90b9-7818b9e2a85e.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 0x5b3e35f598ce703770fbd212bcf2f4da31375f7aabb52e29c926fd7b626b97f2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USWL12201653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7443d6b0a3e42ee0b16ed21c7c2dc790f12e398b9c97de5e12e559774cf6653e. 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/USWL12201594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b54d2fa460fc40d4396bd7af1118e8fc8aaa72480d838ddc56929d4477ad4a6. 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/CLPP22300141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7a65d0d54741ebb8ffaced6f570f6efe52e79c7565958aaa1e2dd0990afffd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72122489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b54d2fa460fc40d4396bd7af1118e8fc8aaa72480d838ddc56929d4477ad4a6. 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/CLPP22300141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2c7fa560092df28adeaa7be512c53283612615a64357a982440787c8732e3a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAFE2006834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3e35f598ce703770fbd212bcf2f4da31375f7aabb52e29c926fd7b626b97f2. 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/USWL12201653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1a452dff7a8ea76686f0d15da80f620832913363ba95a6a193445e80f269d1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5702200256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a28777ee5746ed856efd967a467d2926ecdf0c4f6b1ff53b541abd88f779f0b. 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/CLPP22200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5cb41df26bc40dc28b989f7d4e4a3c6586496cb89c2f205572609e059e7824. 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/TCAFX2141051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afdbdca585510ec98bc1d972a7639f53cbf6bf4dac2bddad09bcea984595459. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAFR2120062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0162709f77cfed84830ea33adf2a881ae70d598bbeff12cf7f7462cc504d74be. 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/QZV4A2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8e7963bccfdc31e747b84a037b5394b98f895aebabc21b0a1a4dedf1f1d66c. 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/ESUM72200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c644e52aa5e4cdeae2e28310c3ce704066fc447e0b2efb135a49fb3663e29c. 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/USUM72203827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960f71b0f4838c533c75d4e2464d332954e7b31647eaa6a65a3786da762aad0e. 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/QM6P42459310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcefe13c2e956fa33ba666613f8e8a0429a12782ca720189c544ba4877ff219c. 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/MXB952200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcefe13c2e956fa33ba666613f8e8a0429a12782ca720189c544ba4877ff219c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MXB952200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bc7aa88755dd10f1d348aa0e703b795a9dd62ff7e9a6de1f96e9b4830f6832. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MXF152400881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62795734b018e8133a5421648cfc67b346f585905885e7ee8a70b00010ff4ce. 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/TCAIO2440842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fea83f0d3a504e560ff27a7d9888e3daeacf2a0b544e659f4658163146f301c. 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/AR8TN2300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce87cae0510c46e3e8abbc169af824db0bfd5ddd8bd4b1a5fcec8233eef31e6b. 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/GXD7V2300543.