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 0x421c838142217c24c3babc113084433fdcc86b6d1387454219dd58ec3b2e232e. 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/237c1a83-293e-471d-9320-35b24ba2543c.json and https://artists.proofprofile.net/proofs/artist/237c1a83-293e-471d-9320-35b24ba2543c.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 0x0a682e122ed2238003a8f228b6b93800cbcf81e7e5b60b3632e749d59f218717. 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/QZAPG1761690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bc9dc1640ba015c1c26934b6c15e5777601ed328d69c074c195aeded047e23. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZAPG1761691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe867d504cdc5520ae2798c55daaee40df89834714815044498681630532b914f. 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/QZAPG1761692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e699b91262ed98b2165384f830f8a8cbc1e85cca1241e959514c5ac0a13abc. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZAPG1761694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2e124d5125a950dace147d7c9be25e9887579ad3f7ab7d676b34babd882f09. 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/QZAPG1761695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83307b8ff42a6a2860d7d7f3b449e8f1aaa4a3f079c18037095895064d751df5. 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/QZAPG1761696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33ff67fb5ef524484d34e1809b4f349999afdac0a9b8a5dad9ac6ac82a0e5b7. 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/QZAPG1761697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1718786d8815230dfdf762867cf13ca891ee244fea19ac7d712ca50a55b1ff. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZAPG1761689.
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 0x87cb790c3c74672264938ad31832d5cda085e3b957dc34823f871a956be64991. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZAPG1761693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69c827474da0bc2e4569a9997773d52106d15403b16c3bf438ed2c8d25c7057. 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/QZTAY2332023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbfb2996a64c161508a4c1e3f9d09af5fd0b5d189b777dbe7f18819745bbd2d. 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/QZTB32377396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfce7466ab5d089249b82e4ae327930c65ff083a025dee1084f66956218d7b7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNWS2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1728580cb7a045247534876b6472836c57954a8d9fc08c093a367637826729. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM24S1802671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da7935d7285c8fd5c4049a68b5c7b4c4664a7f09a19c9824d3d31776ec1ab38. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM24S1802672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ced6e8aaf8b2ff8e1384a1436baee5344b20ed863a426671113fb5a41400e90. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM24S1802673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff088b223a3baaaaa9ad5c115246cd153ea1aa2b80c26474d1a071de648fbfb. 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/QM24S1802675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe76040719e9b7dcbde1fd84763113f629a710de627ce1743589cc0b1ff1c37. 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/QM24S1802674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134fb70d50936bd443e88e2cee71b5ded3972b0837beab342da7b495044cdb06. 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/QM24S1802676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfce7466ab5d089249b82e4ae327930c65ff083a025dee1084f66956218d7b7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWS2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1d0d8b3ef5ffaa52b5292a14ef3e496d06045f2155619d48d279a532ffcce5. 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/QZTB72263171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1764d4d7cd01d13f01a57024db2a599bda5a34173dd731af4fbac62e8901cdf2. 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/QZDA72249737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7f8d17c406fd24d386919a09e666197c7ffa20d6af75782628cb1d3d07577c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA72249738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88eb7a9468cb54fe43b83f2ca7e32338936f5986c2c88a51e8be27eefd9de7b9. 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/QZDA72249739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617bda1df919a6eed0ab8e789ad0c8f5065863a626af50d0de37389bd2f96e55. 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/QZDA72249740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b0f38b906c7e0b074783310041a8304accb21788474b6ba310ca92d8430cfa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA72249741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd41da361b3519fb0844ac88f9a5be241b1d4ae16b7ed3c0daada34ad956d225. 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/QZDA72249742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128bdba61107865f6e23a146f6b3600058f800c92e6ecf95b8e4aaeffa349681. 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/QZDA72249743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b84b4ad73bfd9e8751a47320b22d9329728056358fe11129f36bd0672dc60f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA72249744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fedb1179ec95116da38bfd5a5397773e02bb16cb51f3deb791a3d91825a822. 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/QZDA72249745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d5867f292d7aa277c96ae24c1411344e23a4582051de4336589f8a4336dd3d. 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/QZDA72249746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82ec9174b9d62cf22df1a3868fa16974a497d2ace0b516f18e20fa77011f885. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QM24S1802670.