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 0xdd8ca05d7c0ab6867e534f0055bdbdab6c4886c6fe910aee6d24236ae2816361. 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/a27b6237-28a4-4500-b5d5-89cb63f2d994.json and https://artists.proofprofile.net/proofs/artist/a27b6237-28a4-4500-b5d5-89cb63f2d994.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 0xb99ad8f7a109fd32cb17e00c5b7d6a792af2de833b86057112352666569bcbf1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CAUZ81800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6303b6b8dc71cb4a4d90742f03aeefb3e7fcfcffcd718ba3f1b8cc45b14ec488. 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/CAUZ81800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeda4b85f39f3be0a0d37c5fa172714c31e91c80a4cbb351067e074cee959379. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/CAUZ81900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522e534480657adbedf6f37930c54c56c7885f7dc759239a633e784b4cfbd57b. 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/CAUZ81900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522e534480657adbedf6f37930c54c56c7885f7dc759239a633e784b4cfbd57b. 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/CAUZ81900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813f5394a152513067b4b25cb2dd060e8a4d47acc8f7108cf1effc3d5fbe4f86. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/CAUZ81900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3174edccd6407ac0a89d1571e366152b1a369d3a4305cafb0e78c6291aff4f39. 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/CAUZ81900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3174edccd6407ac0a89d1571e366152b1a369d3a4305cafb0e78c6291aff4f39. 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/CAUZ81900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bc8f87aec7ebcb95ff09b410d64a5b902f88d116ad0ac9bbf4cf7ac41c160f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAUZ82000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c45bc2f98b05ac91ae88cdf369a9f6af4836d7d154a8fc3870b86930b81e51. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZ5FN2004276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c45bc2f98b05ac91ae88cdf369a9f6af4836d7d154a8fc3870b86930b81e51. 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/QZ5FN2004276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2422dab2193e4abc17d92d165466a6cbb2cd8ad5f70a4e3ebe60f22a603a77bb. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZGWX2076275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbe6e5abf32a1b44658ffe39efe1620cbb05fdf69f806e30a7584ce6add2056. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBRKQ2190460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6842f02d2e2593cf07343a1a0b28a7e526d06b3f9167865e85ee224a0b5bdf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBMJG2325878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2b8a59d38b9ee761c8840bde69f2167fbc2ede87f706ac80d17909babbb7fa. 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/GBMJG2325880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829818b36974dacfaa1ec473f1acf93389af538f06786a6ca385c39db0f60ce6. 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/GBMJG2407086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f14a4f100c8325713ca8ab3e22e232f2cff3dd57b9d57e2365a55c14bbd868. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBMJG2407087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd0651d866412dce45695a0280739e3d2af3f7ea1ee3c1f357ec82b69f41dcb. 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/GBMJG2423581.