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 0xcc462685af7f95bd1d9acaf2ef3cf9028251aee3cf8071f30376735afba49139. 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/3e3844f1-6cd6-45d3-8132-ddbfe5ceee12.json and https://artists.proofprofile.net/proofs/artist/3e3844f1-6cd6-45d3-8132-ddbfe5ceee12.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 0xd734aea572951cd43bc67c4231a79c88070ab5aaafcebe8d08c7cf6d4544093e. 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/USL4Q2164684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb210ceb6e4426335e6c1a1c650251840d83ccabf556624aad3ad219c860f972. 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/USL4Q2138017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4a1c440f67e60ae5ebbb89faf03512afbea55a91d538499e2b81a83b7d42cb. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:04:14Z), 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/USL4Q2139048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193617b5c46ec9ec126f0428296f16833d4cec80f247d358c03ba7709af7b341. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USL4Q2139052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0065138209155d13288377cb5b5ae4bb3d412e01881179ea29ffc54066540926. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:30:30Z), 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/USL4Q2139053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef680c0477138fc4e4384aae93500ef90b9e606d6037668ffcbdfd5dfb43e0a. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:23:37Z), 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/USL4Q2139061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e02d17f799b36ede91581fb2a667fd2478aefdc81df821c53668de792e6109. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/USL4Q2271534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a92b74bdb1387aaa74b6b06777346553eb26515af2077869c049a6c9efc8f3e. 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/USL4Q2271535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f05e3eb4e3b9415d156579e621f570bfb825e24f6974c921cefc2b87dab88f. 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/USL4Q2139074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc880d05ae044fe32a95e8466676247178c3480609fe461e7abd1fe728691054c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USL4Q2139075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3325110676fda0c47cb8d6658d9238a18087fa7dea18b254a1017ac102c9db4. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USL4Q2139197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50778f179c0b362cd15bc0f03ee71650ef721d2850990a1bf02d8146e706e8d0. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:03:27Z), 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/USL4Q2139198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb784f0cf857e5922ea575e3690cd60956432f408a132a70272da6c1039d0a3. 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/USL4Q2139202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8dc325823492007065716c98bcebc7612019e3de90cc5871aaa0cd4d912e7e7. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:49:00Z), 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/USL4Q2146447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858a347a1848fcbc4ada8c1adda503e2b14ecd3fb80cbe20a2d73346617a8c3a. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USL4Q2146448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e8c0e990c6da4089991dfd18eff0b4b9c22c0bf6766726e6d0b24251222659. 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/USL4Q2146449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c0746312a752c8637fb1c59d8f1871e69b577d01392de3591e9316dff80f0e. 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/USL4Q2146450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb48d4abbd8c773b46568a30fe9de7ed8f057a61bcf636300136422ef65408a4. 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/USL4Q2146451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72b636863a42afccd8597cee3706153d512830a15a71c65aec90259c813c467. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/USL4Q2146455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69336192db3be4b25eea1925260783906db590a9d21afafcef1f710a40c9d67. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USL4Q2146457.