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 0x5b5e7d399b5cc79f8ca90125683ae8eda2934b53d376484c32210abe2af01c67. 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/eba2d272-a3fe-4157-9370-8bebac492b49.json and https://artists.proofprofile.net/proofs/artist/eba2d272-a3fe-4157-9370-8bebac492b49.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 0x34fb16c9595d5048cfe05ec9f95248baa70ddb188bb990bf25ccd2129c010bb4. 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/CBEDD2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf78bdbdbfa4ddb3635b6276a0458e2f59eebef9f8fbe2636913a3f18c5d814c. 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/CBEDD2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb1a8461643704dd3017cc4b84ee59561c5ffde697a5f3a2ab8f36233f042e7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CBEDD2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ae320889aa457e7c736f9ffdaf307954307eeafe6a6be249d0d188f1bc4506. 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/CBEDD2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce610054d2654a6f1b884bd18709c008e587349a3d2a4bb1ded535887eb7b643. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CBEDD2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16d0e71c47389531cca57843c01d15a611ca2e01794c315ba0d3fe17ba1ea56. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CBEDD2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcb9de6592645fdba9e5c2676d53e511db3ca400432f3236d37a68a2554df8b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CBEDD2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f9c389cdb61f337e69ec9252aae8b6b6b7d1dae32b23a995b3094ff0f7199a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CBEDD2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22626764dbe1ea7586c3fb099dd3b62f7cadc330aca25aaa68f50595c24842d9. 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/CBEDD2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7b5f0df087a53a1cca183c9d6e2ac5a8af111c759eb9b1c23b74c6755c577b. 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/CBEDD2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef5640fee0dad3bb2ec2aa0685ae17e9183174a71a059e7b74a9d115dc650cb. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CBEDD2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf057ab09e3147ad60151ab781f9bff443f4a3ccc566d913ef72579673636c20. 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/CBEDD2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcee5bbb05a9d57f3b7845126cceecea44f38ebc66539f70ed638cfbbf85da7. 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/CBEDD2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13661c8cd70916e43ab09bdc957f68e967bbe2cc7bf1439344e899778887037. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CBEDD2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1211f5590cbd59021748699d02b308d2b9c85d5662e6a84d0664a49aa427108e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CBEDD2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba47976e322be782805e8f1deb85e1b30379b22966d3a77cd092b9f6f0b6261. 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/CBEDD2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9904a49d8faa644f9e09d87008e6ac9ab174aabce6c5b59382e2696cf94b8b. 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/CBEDD2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b96e616c807ab7a1b4c25f0fed480e88771a1e0d972c9b6a28a8bb034a622c6. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/CBEDD2400021.