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 0x721dcb7890957eaacb9cfebcd009f2ea235a2af0c84e3c6d42dab96e63243cf0. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5616442-3ef8-4fd3-87fc-83f58a9dc054.json and https://artists.proofprofile.net/proofs/artist/b5616442-3ef8-4fd3-87fc-83f58a9dc054.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 0xb1bab125de1a5ebebfe19058a53f9a727ae629d4ae5fef5928014505f4aa11e1. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QT2VB2473272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785d6fc9e5e5a4e5ad8bdc91d7bfd673b3bad773ce3646f79a49bbf6bcdd805e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT2VB2473273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc2687896307029e4155a9b03a1fcff8dbde740ea82d39a6caa1b180f9cffa2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QT2VB2473275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc297175e8d11ded6633e2e7d982afb1f506f8c1e3631f929873c7d3fc256e6fc. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZVEM1883024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427dee04d6361039f246b48f962762228c2640fd9b52c106ef5ca843d51fd657. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:28:52Z), 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/QZVEM1883025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4bc25132c2ccfc317eea25818504583bd72c44830c14cf7c36ab652de11a0c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZVEM1883026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f1ad71a87284a74603d664d6a1568e2ca7f9d26120d2bb2e2fe3acf85a4673. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZPEW2529397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a6d05cc6e05a21d305b5f985356956cefa788e68a1b32a3679d23e99c102d1. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:42:07Z), 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/QZPEW2529398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b12b6e4671f4485b451fc27f833ee009bb218ebdf8ee256d284beb6e6756cca. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZPEW2529399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38bbbaab8942c2337e1cb4b00eb3b38d73c54b669a80b027a402afea08775dc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZPEW2529404.