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 0xbae74e9b91b12fe52d2cff0ffd5271a47d017671070755cce325b843e19d01a8. 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/5e019252-4c4e-47d2-bc33-1a3b822be0a0.json and https://artists.proofprofile.net/proofs/artist/5e019252-4c4e-47d2-bc33-1a3b822be0a0.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 0x49eb56c08fad1baf01ad3ba253fa5a4cdfe0bd767cbc28decbe6b00c5d7dfef9. 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/QM6N22196297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c243335585eedbb90c8f69ead32cfedb9d744c4eced597a93ff4909e6585c1. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QM6P42104117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16b14013a3599ff02f3b46083032a85d7130bd4d0ee75dcaa7f5f9701b2f692. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QM6P42178090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe404da3218c459aa6eb59995359f7cff31bc37c3843baeefb9fc3662cb5e6024. 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/QMFME2177578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41291625efdef9c4ccfe96a68b3ec490586ef2e781833866de65c29365b0faf. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QMFME2177593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9751322fb6d421c8e81586d0f60cff1e0157011de32e71b5aa12883675055ab. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM4TX2276337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96281d37aa0a05908fac0866d5d643a92950c75ffa83693f7ad9de2909dcaa86. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6MZ2274975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee2ccfb03e93c80e8fc2aecf04957d232c1095c40640ffbd27f22930b935ea7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QM4TW2344247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16ab9e49136cfe225412b8b6566517c5d39b785e321dee1163897805e351b25. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM4TX2303248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4829d6ee0c7b0d2aa24b36189555d23d37e0a9aa430d6dbb49030707eab2095. 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/QM7282381274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8e7a9057eebcad668de298015f20f31f524ac9fc7feab8d48e49a9b254fb7a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QMDA62398195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462438a6396784fff269597a7bebe37858a2649bbd6c1d8a4fcab206a19f5bd1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM6MZ2457554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fd770b3771fcd34543f761c7c03eef47510afc1e9707c14d8d2e29be4c2c15. 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/QM6MZ2457632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5689e66cbf35979c93854ac7fa7e9509f1aeac10871ef81a09bf73daf0828971. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM4TW2401348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0214c59b625d33351d3d0357746cd44ca2a3958fff4f1b86c5071d774da00b51. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM4TW2483712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d532a2b4af0c95e00cfafe27ae1eeb51f1191c1b6d3b9138cd38bc522cb7359. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:02:20Z), 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/QM6MZ2433121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c46803fc85101765b454f6d24a8dde507e92b8e75aad16021bb50ad1bad68a2. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:46:21Z), 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/QM6MZ2483334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d4a0a8a9e177e8c27cfc4c10b48cf2532028f15ffba0e0ca1555d51d7c9059. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6MZ2483391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb079b6ed757c8ee291f4e0128ceb374c1f5b6f6d171280d3011a720a330602eb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:47:03Z), 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/QM6MZ2550632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdc12f74efe03e0f640032f36b19ba7f7a558479bc88ee0563e53deb42699cc. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QM6MZ2550651.