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 0x07bec66c35f9bac2f239ffd383591bb14fcecd7f07c4fabd4af82c7f32466344. 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/7b5bd222-38ba-45a6-85ef-a00ef57937e4.json and https://artists.proofprofile.net/proofs/artist/7b5bd222-38ba-45a6-85ef-a00ef57937e4.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 0x7d28fc35a7ce1b8acbce4f23c6c57aef5097147a8bdc75942ecd851cbc74a763. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/DERF61300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a5b73978ce18b96353682c9f90e72e31b8bd02883df966c29139631bd4a82e. 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/DERF61300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0b5c68d629cf75f945c10bf8d59daaf7f031fb27fad4367e4e10beccf23296. 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/DERF61700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaea22694b84a9d99be0742d97f21607dd401689473c7e19426798eadef0019. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:05:03Z), 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/DERF61700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e4f1350222b569cf890e00ba6f475384f6b8f042e088864d55a07298c28e20. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/DERF61700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36995c40f857f6c9805458aa6d6bd7f11a0f691586a67df0b5971c07d63f6b67. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/DERF61700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebde41b3047a800dac31d360a287e2b2fe39a4cd7c8539363828bd545fc1a2c. 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/DERF61900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33496c7e90e15531db6be9c102bc75448ee4d64a60013156e7adcb1e8bce6f08. 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/DERF62000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e8bf6756a6085a8f49346b0aa5481caf83310b1813ae6128a0896266461f89. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:00:18Z), 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/DERF62000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b9cc63651a63a1689fe35ce80832c8b25c79dc9f7abdff6e287790b35a85e3. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:39:15Z), 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/DERF61900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e700faed9483f53500c96d321c3bc0c1aeed21b7dfe42f0fe09e5819883d02. 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/DERF62000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b47f50bffd71bbecee6ef355c913d92b5879450253958e0fc820c0db9a38728. 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/DERF62000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f73af0d66befb67d04fd95b5a71b27b42b883f991b007b43934a6887c2cc554. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:01:32Z), 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/DERF62200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74486de98678ae05bf41c8434c84d1e144fa694ce3d44a88392800f7984e70c7. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/DERF62200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f203536419dcb51e2ee48d811aee9753cf3d75db1ea3a3bcc034af39600fb9e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:25:29Z), 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/DERF62200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a174848496940448bb49277cdd4596db9491a5dc8d4e6b48bed2d5cbe152b1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DERF62200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f7d2bed3c5f5c3c04703b4355ef62aefdd114c3194f0a96098ce0c888d3fda. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:43:37Z), 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/DERF62400001.