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 0x76547a0452ad8541fa43116cf572c5d1d0700427cac5ecb60e4e1598dff74e20. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88f4f8ae-334b-47e3-a0d9-f62a09b24f9d.json and https://artists.proofprofile.net/proofs/artist/88f4f8ae-334b-47e3-a0d9-f62a09b24f9d.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 0xe9cf5350178ee7b5320283d6462ff9c34410645da45a096581b49bff1a5795da. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CACWV2558030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2233e697bd223313f44540d709dd2f1520c0540d2c97567c71f4e5ff743dff9b. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/CACWV2542810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab9ca5b54fd2b9ae013007d84000e5965e5f2a7f2564540a6733cb83d446865. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CACWV2542733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1419c18d06336ebac41f47c450e6fa141466a11428906b3a9bda68b44d9f82b. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/CACWV2575974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe542dff88f2adadd9ed14dd3d94104a52f42c0f07b596079f270c2f40dcfdb. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:36:03Z), 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/CACWV2542813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9419e28755d6b7d70be6dc97b1e537675f4f5441ae9ea86a52658be69ec3001. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CACWV2575972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4367405548ef91937ec0614aed5634a8a9bbf9f8043b4a4ddf3555a209857b4a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CACWV2542800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb401bedd9a73d6ca3d52ca0394762cb1f06d1a0ad5b59b213866c4586c7f3cf5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CACWV2542734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b1c5010a95bed26cad22f7d258340505b52a2fa8b1fda0dc50c466123b6f72. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CACWV2542809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f1ef3d0879bcc93a1e171e7b12456cd33694f1491a34dbb791e92e9d31cc59. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CACWV2542730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fff6c2164ac06f489676290772ed41c4fef81b1f3f34e49f5aa9bd7f98e5a2. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/CACWV2576035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76027d424882a6aa2f10230679d22bf36668d193adf1372740e262f1ba834d10. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/CACWV2575944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bbc03ee23e4ca4e139c9618674d8d0b8a6626276df2029f27e87a091f93eb9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CACWV2576353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6140e7fdd9393d023815aa329b4ecfdc9a0cfe2dc70014c6517009140d7c1b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:58:35Z), 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/CACWV2576352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6b85c60c3e0a9f069e4c8edc081ec25d8ade150fbce1396192fe35ecfaf598. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/CACWV2576356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f69c044b6db256a73100d9e3b2b8a6bb67cbb57738f8151f995661d5d4561b9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CACWV2576349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa742cdec62a17990979e97b59bb17586d381bfa651de83c52538e7c14045ff20. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/CACWV2576355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4c28d9eba607c40e99cb11b24fee5ea14e9e4a8c9ccea571e9480f7dc98d7c. 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/CACWV2543236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994e9b49d26d6be7deb51064f8a97179699665b42fdeac870624a08b43e12470. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CACWV2579217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffadca0e8ffec51889c7e1420c952ac489da45be3d39481822053d4b88132c5. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CACWV2543237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283545018a90d5cb9ac36a49244d1e2af3d51b3f45bb72eb762c4cfade1dd2ab. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CACWV2543235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b07b71c41cca5be5d0d650fd0e69b6e0bc418c3cc62021a8de5e7d9bcc241db. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/CACWV2543234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaafaeb850f52e6fc6aeb2c1aa8744d6c66f7c6509084c7a288e8fcdad88544. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CACWV2543239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff892ecf76146de443b760e11979f23e7ae6e8df3d89b087631d457a6f97372b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CAENV2528491.