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 0xe19046f9a87c28ad438ddd98716dd2af911f906ce87d082e0830ea9c9f162b1a. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f1c82ce-5592-49ab-a92e-ffbd5c7335ca.json and https://artists.proofprofile.net/proofs/artist/3f1c82ce-5592-49ab-a92e-ffbd5c7335ca.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 0xf6e999fcea0b6cf11b45a4793f57d4628de6a1d7fb800c4c74c85ea6e87ad32d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PEFV10707001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8240c96a25d82b042b5ac7a12ccc753d2b3ef44279580554da7efee3b4e10fe3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PEFV10707010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaaa69aa00bd0ad0c5ff0b46076554467c7c355595650801c97fe36b8e3a22c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PEFV10707012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f577a1c1dff6faaca065d648bf9da815ed690707368f6c1fc6b044bab260a13. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/PEFV10707002.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6272626b71016c6bdf1343204e8c6d4790c6252759e2b0858c3d88ec0615f5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USHM20844176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c236716479eb83e4807c4aaae51e1aa1c546f4e4c35e8880f174b7db4424bfe. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USHM20844177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdd424d323b42ac3263d058bcfc4a76ba85c986c5bc40f3a96bccdd2a179e6d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM20844181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64eb3dad5e82d5fa1ea847ee9f98ec3581d87265bac6102cdc1ac24275677736. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM20844184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d7423e92b8733f992daeb2dd50be99ec050654ac58ec636edc7a691cc73494. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM20844185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69353ccbe6176380819c7e38b7987c980fcf342e3ab1e5b35c3cac6f830d43ae. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM20844186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6244d927d606a79d09b4371bb9347f19859dc39898ab5496ff2e6176694dbcac. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/USHM20844175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c3e77ec2f2524669e4185cb9d285f77e2ea8046c95f2b3be1a49e3a8b26779. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USHM20844178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a01996529cbc7b690e99a162408a69c6b41aed483bed0b084deaad0f2d35e38. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USHM20844179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441daba5d7e0a186ab8be29319f28ded81294aaf2ffebf3e05b6546d507af4b7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USHM20844180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328d417ab8b518a8a71f938c436cf833bc044cc7bfd1c6e993e888e7f74f5763. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USHM20844182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce18487d1f3a6caf157ab86a3ea2472eed7ddf8411030c29fde8bdb0b851fbe7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PEFV10505001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac57bcc01eaf47cc9339f5b43d9fe4948caf3931ba8ce92cf5867bac1127319. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PEFV10505003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75de7e19685da876ba38d9f36440d43d069f5b2f8cb136df5cbcdc8f0699ed4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/PEFV10505004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd140d971e35e96be8802478a49713f899721417834c315d51b117b3a38ed922e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PEFV10505006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0103e545cda737bd8e82f3ae4aa8b27331f74f94bff305dd69e80a8159d1270. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PEFV10505007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa73752ff0a573898d4c4d3e450beaaed5553a90786dbd82244b48a213f0f35. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PEFV10505008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9bc3853db89a2d8a6d73266d7f5f465d5a3a390a33b091e430b809b6d89ab8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PEFV10505009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3294f112d51cc130c148d1d33a6e60189ab1117ce2443fb62fbd7becc0a88b74. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PEFV10505011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9cd6f09763ce53f0713e5e5ca4d339dc13fe26677a30c43a0626193e39ea7b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PEFV10505012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b35f557dfce8703023e7515c634c5b761ecf99b5244e26e2451f9bb9184be94. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/PEFV10505002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec5c7974499bf85facbef47e5850ba93c8efa086032dc2a2d5934f30b5d0ef3. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/PEFV10505010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a16dd8e5c4dcd8ff22e9305dd6167a433c411474ecac3bee8a3df50945ad162. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PEFV10300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792286781812766b6bc52fe716101f02fd1732c72d4baa3114ba7f5af6508d72. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PEFV10300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fc46c5c357130aa5ab2bd2859a437f0f7480ec28b79c7d44a6cbe28f55d875. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PEFV10300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16250d2865ff9ec8e413a0d7581c4c4c571b986d39834f1e7fd99853b99fe2c5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/PEFV10300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be47fd973bc7ca078fb3b1f7dfb79532df765646460cf9c4e5a290b66234be5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PEFV10300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8a799e4896aab0d7e0ad2133ad6a76fefa1456c238e34476c5b3aa35640ffc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PEFV10300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcf74b092d8ef5d5d151bf3e273a03b1718649d25ece534895b48f48c2a300a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PEFV10300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa58f29c3e7e9df415e2bba6dd341624f3c67f87a65043b0e34bb7b26619ca8. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/PEFV10300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c72d91a96508b7363dbee693429985412fbf50d54d02cfc8d003e31d92d5cbf. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/PEFV10300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0450c61112c7fbbc951cf5c4e4c0f9cec3a54675a8f2b1409d62f77d1a27e390. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PEFV10300006.