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 0xafd49ddd1598919ab92bf71004218bcdc80e4faadbb2b7de6b3a5ae7c5d9f236. 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/b36fd519-a1f8-4410-bfe3-4c411fa9c20d.json and https://artists.proofprofile.net/proofs/artist/b36fd519-a1f8-4410-bfe3-4c411fa9c20d.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 0x08567209cdd2f4ad8db1a01acf4473a393df1883d84e535ec013ef2efe2a7400. 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/USA560635150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eab86d7b3bd6a4c87e1e2a73c5be562b8e4a1a4d76513de04d7fe181cc1a3fe. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USA560635155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9578207706950d094abff91c0e1c9d9dddd50ee5b798a23a4861bfe0287d5a1. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USA560730195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281b34fca1d6ab8e8b28d004ff4f9ceac20f16ce19777df2fca91531c2a5478d. 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/USA560898683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea36e95ef089669ec250e80c5bbfd87ca517cf2d27c31d53a9858449ca72e780. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:13:52Z), 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/USA560898684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b8e0983ca20e956c0b2894d4d37342f7ee64e82ddd28fdc41607671a882961. 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/USA371126634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c32305d69fa25487b022e61e191ba24fe68cccbfe60e9b024c0f1946f6fad3d. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/USA371126639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fe16286dad25f2097ad4703ef37ed43492c2d1c875f2f9ece182e8405f8058. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/DEH741210363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76503808a49103868abec4bf388fd0cb2b83d4e3457cc2aba4afdaf376028b78. 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/DEH741210375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d476efd578f5a390b1b72ea98f67c2c4c85493c6c6f86977ee6bcf2c784992c. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:28:18Z), 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/DEH741210372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e03825195468da02f45b05999891b3ed19bd143d6bd49f1a078e0ef109a0750. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEH741210377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fadd07eb94d7185da8cd36f55617a8e02cf597235e05ff83c01946e397ac31. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/DEAR51300264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839f3eaaa43fc3a3c0f596c2e47f5d76d47f5e4239e17b47f655469606a617ff. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:59:44Z), 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/DEAR51300265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac39c9b75c0b1c5b4a4853eb6b3f3a859dd285a438e934a1cce1bc8411c3f533. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEAR51300267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539e19e55972b83ec8c9ffb12fd1c242c6c3c3195c092b6fe1c450f1fc5ce8e5. 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/DEH741310417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74c84042ae9befaddafd2445fb99aff86add2a67eb51d274ac1a882b0f57f0f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BEC261521609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7902a6b23690b9256efe0a43c0206fa0051ddb0a26230d9148d0ad1acc41818d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEBZ71300649.
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 0x859a94a61418bb87b397f3c38b33c58983b4770cfd8f686ec21e4d565b1a8247. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEAR51500112.