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 0xf35d6416ccc72c274badf6660a42cc90958272d83bf2d72fa79f2a64ba995064. 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/91a4bc92-7350-4ef3-93de-086f013f1e32.json and https://artists.proofprofile.net/proofs/artist/91a4bc92-7350-4ef3-93de-086f013f1e32.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 0x329e8840cb43b1798a91862de66f2a4304e3b856817ec75068d68a90ea18ef2e. 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/US23A1536203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58f10ac3002c8429559fee4cf647d0cc335341c2b135fcf8456f277baa1cfd4. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/US23A1536031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26927fb0af8fbce57db4ad9cb99869a8602ede3ac227ee9b36a9c07f005d5ab7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:52:18Z), 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/US23A1536185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f3390e0c80b7823a9dc73455e252b0321e6fbbe54fdeb52624bbadab782734. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/US23A1536032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa726129813b88c501855104306654711f75280356e0f3bd3a037662300ac0714. 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/US23A1536322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83cb8d368379d26346ec8f406506f809e0134578f749361b8646afb1b65620b. 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/US23A1536193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fa39b8876f80c0c2e70b7416d1d4df0bb26b1969a72af4bf425c962b9138a3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US23A1536332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9537684144c21044db4267157deddfece6c8ecdf5a0f5be783f4db240d4a1d8. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/US23A1536794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2431b4be9fb9138926e6b2e9f8241c0369d32ad525ca9e9ed52a00f29cfd0b05. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US23A1539246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fea9956dad2fd24167ab40ad45c75af8b459b331e86acc1ec0af1db2d056d1c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US23A1539445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2cbd46baecd5e52223e828f61243840088b5587f5e44b0df649fdf4b119b20. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/US23A1540836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fc524481eacd669651b33889009ac7ad2cee4e68824965ab899455f95cfc8b. 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/US23A1545426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8003c164d95fa3d5114bf922fcc1296ef3d9fc5927611c012995feaebb5e7638. 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/US23A1546549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d82b77706c61fae17843bcaddfa278416223546c67bd0fcf4b3eccf46990c2. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/US23A1549443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b84f9fbe53634aae5024f662aa521378d59daab2c9878abfe51cbd1e37d460f. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:38:39Z), 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/US23A1551206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b56a3163ef15119bd6b7af0e64e57fa84fe4f111aa44a45a04096d58cd6ab9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US23A1552939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26be68e6dc6911de7b2e04c6f6379a53f3201e58d3582c8c638f7738fe92c72f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US23A1555181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f5ce4f486c38e20d34e13196d9e766462bb4aaaff37a7f18f54d1c3b5e9c15. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:51:38Z), 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/US23A1555554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1150252a281efe3d8c8c5e87a89c8f1f074f147f3c6e9d2c83d7b78fd4b079. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/US23A1556916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb9d18e6506170ae28c75c2484e2130a077ab3ab4806b79f0ac9782edb80376. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US23A1561317.