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 0x5cff8070c0f2eafa70185708f83362097d08828508614e6d0a3a74c0a619742f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e1d0e66-2d28-4c3b-ba0d-2ceefd264b29.json and https://artists.proofprofile.net/proofs/artist/2e1d0e66-2d28-4c3b-ba0d-2ceefd264b29.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 0x6d41ed49d858ee5cc974d5c24cef48945e633535e9cb36215ee4e84eef16bc26. 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/ARGO92300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0000028aeb3b1ba5d919a5a9dfc947a57e1e360edb9ee0d5ee8521d401e78ef. 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/ARGO92300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d52c4b8cfbf0797ece73361e194910c884e3a1983087e32e7a195f6d501575c. 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/ARGO92200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7b73b5dc1830f8354241939a861ac6e2c8e3d84bda7d3a1ba0982a4fb979f6. 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/ZZOPM2237725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c24dd6475806e32208f20c1b6781c5959b59b005602e18f094ec0280c03dd3. 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/ARGO92200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d98b65c2709cdb53852d60833cc4a2df46d2fa22464ab677e41450fc22b285. 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/UYA522000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07355b9729541525c1a048ebcf1447b60cd8444bc47230fbe21e8d1592f9cee. 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/ARF101800231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81cd11b7f2aff7a3582da96320708ba60c2ba5c18c41a3c3ee975d033139784. 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/USUM72023592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a10c17ba7c6e153529c17046d6cc49abbf244f660e0ce7d7e46f4072afe7e5e. 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/USUM72111951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81cd11b7f2aff7a3582da96320708ba60c2ba5c18c41a3c3ee975d033139784. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USUM72023592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9f01eec1eece62183bdec478c2963c5b19ddeb0ace46cb51b008b6c4aa6885. 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/ARGO92100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a5fdf78ebc1d86aebe1f503d213e238f48cb907026ba11674a92a5afc36d33. 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/UYB282392005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60f6e939d5929acc1d9a701de3dd779ddfa9daf1e0f88cb6c75950c5e2a56db. 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/ARGO92200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c85cecafd337cd17b91349a899da3c1ffe8c94ccac0f3ebff5b1951f2551d1. 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/UYB282003008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cca4f716ac6ef341d76d731feb6764dc0b7bb9a7ce1a5d6c2ed4354f1e914da. 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/ARF102100060.