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 0xc6ba69005feca58980bb6de44d2819e0076d9ea7808a017b8dc30f6a03f76454. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f0bc706-cbcb-4277-9791-3eb483668e2c.json and https://artists.proofprofile.net/proofs/artist/6f0bc706-cbcb-4277-9791-3eb483668e2c.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 0x7c19aff4506301131bc0bf9f83dec1741b4598e84699dc850036c0764e48d37f. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/USCGH1789281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb7da3bc701ed9217793771d87cba796eee038e167ebab211acb2ad5c8edf81. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USCGH1789282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc3e8fed8bb563ac263ba04f81e2683fc4c6c757970aa1b9ee82df22ac461fa. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USCGH1789284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8959d83ef4b87dda245945df07ba0367cc20ecf41f512ed1820c804af9c24de7. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USCGH1789285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d80e2dcac8ad1d27d04cd9efe536531a91195e6a73952c2afa9c14dfd605cb. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:31:47Z), 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/USCGH1789288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981a289b09dc6de26a07ed441c0f6f38f2707f5f6ac936bf6c6e5901a31dac20. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/CL1252212801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15ec4e5f4729a8ae8778d9fcf2fae65a148f63456a6f2c2766240ec41d853b9. 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/USHM92472138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72792ac6cee8abf4915fe3efbcd5b21ada851f1f10591c9782b2a167aacfe710. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USHM92472139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6357ddae348e3d2a12d5b52af57f3329e0bfee3d50473491e59d7f08cf5dcae7. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USHM92472140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd213c008927d57e25ee4b0ac7c59ecc3f7babba3d5c14e740c608bd96b9e102. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:41:21Z), 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/USHM92472141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf52ce627378c305174df5a5d02b236ba36796e1027c19e61a02f2a19d3cc4b1. 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/USHM92472142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eda9e5acd23512a12cabb39d7b9e74cb6a668d80826a38517377540a018f46e. 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/USHM92472143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e9ee5c4fdcfc2ff9a505368d69e0b2bc9ddae54620809e958bf85fa0b4142a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:53:31Z), 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/USHM92472144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fd4601781acdfb08681be219ffc4cd9c4ee83488d9551f1498dcc08ee2be25. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USHM92472145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbcebd680c08e557465c823d4cb4c74f9d73b87917de34077c5c585a5511993. 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/USHM92472146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f5d35a0e3b9152e5c8f85782ca4bfd840830dd3e27360353109113837735c2. 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/USHM92472147.