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 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 0x0e8af3a18d357b5e12c6858f8f901d210a8f03ffcedbf20639cf1dd8e0d310bd. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd878b98-7da8-4252-a4e8-8bb4601e89a5.json and https://artists.proofprofile.net/proofs/artist/dd878b98-7da8-4252-a4e8-8bb4601e89a5.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 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 0x33fce7499a0f95e1b9468cf6866f0e39daf4c8ffd0f6db0fcb1021dd7e387441. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES71G1629992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e58d6003399698ea14ada34c373b742fb62ab4601c296497ba2c8042df2108. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GBLFP2005174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c307bea696b31e34f90650f7104b7e63d3ce81ad9718ed26dc24fa2e9a596b9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES71G1629999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4794adaf36e59b5502f760d1f34c9bd2f79332a38ef3d07f7a57e8b08c6c75. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ES71G1630001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86df07dd80306f280046f82cfe0295c9106c696c3801213e5e561028c95f6d2. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ES71G1630002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc081ce71852387cd0fbfaf79d17b89e9c5dd1dcaa154b3bcc2467951a5039e96. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/ES71G1630004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7e01291670df673cd6785aebd9bbc7606e1787533f2a551d92a780e9607e7b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKXN21935507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b72be5a16af115c50a8d8bb1777fc53fef9516cdaf6f941327ce3b3ece528e. 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/UKXN21981522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e09a8ff12e6ead059582de7ab307fc6ac712dbac8ff4be460761d4003ae138b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKXN22011301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9200232771dd5be76b4b5a7d271288eca9c4425c3457984418a62dad6172c01b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLFP2121057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4380aad0ef658cc70edbe1aaf6af03a3d4e21332346218bed13ea787d93d1c3b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLFP2121044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb89eae2dd8b0da3d60ba7997a4af2befcd5f060ce2d233485d6746850acd1c. 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/GBLFP2121000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d4ac363a1c83e8607e27655d8feca8b8123bdc0c44130fc821bc85c5734892. 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/GBLFP2121053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cd29ec1f8ad4d9b0315d64b86e496aed5616075ed8e4271075b9533ceeb914. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKXN22074485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7e01291670df673cd6785aebd9bbc7606e1787533f2a551d92a780e9607e7b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKXN21935507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1161ce62db6a2b09670ee88685a017a9878dff018aed70a6758c533b4d6880e3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBLFP2120983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c65de36c6d97aa1c33af49abceeb4688ace08ff73678cf437b20f6421cbbc6. 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/GBLFP2121058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7842a84a2ec2377fe1ad73860806646e20a0734cc0351998c99eb2248e90c81c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLFP2121013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a99f6364d2c99b8f4cc7c6e3003eaf3e59dc8ae01fdafa331dc9753c3b0a4a. 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/GBLFP2121008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b617e684c7dc6860b27413240386fb8d6e1c77ab8048fef374d54ce90ebc092. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ARKO92400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bda7bb5c6fdc1fe1670d4cf26de531a446f805141c10277302b91f29e31a91. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ARKO92400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8caabb3dcdba3a592495ac8b6758ed3dd045befd4948c7f462c37dfe4dd3d7cf. 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/ARF102300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449cbd050898e633b26cc0e7740d06bdb2364295c45b5f7b92f8f6c57f1a9a7b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARF102300117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06ad25be1f55fa05d93070ac5b8eb76b72c646f5968c880d34a1ed057d32390. 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/ARZ911200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44822ab1f200f19ae37419f05783d493e2d9b58685dd540c56f5f1dda1d2ccf4. 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/ARMZZ2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4a643a20a972d6d2e4168763243353bed4a56fa5f8e3d96130369b5d38c587. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAJM2566941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783dcfce8dc2566197e36643a7da4264933dff0f6ac08aad3efcf80440e1956b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ARZNC2400008.