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 0xa6f923f72643426ccdab5dfa62cab77e3ff36e50fa22623d52ba351756c6400d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d10faf11-8923-453a-88ba-0fd8963ec027.json and https://artists.proofprofile.net/proofs/artist/d10faf11-8923-453a-88ba-0fd8963ec027.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 0x88c97fd441d7996e2f28454131cdd01c0b97c1809b60aa5c4612f088b1cf48b2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USHM21563784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4fdba12fffb37185140eda1df4f6f4515c639e1558ea351f6e321202059a4a. 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/USHM21563785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4b3f361114a233366a25800bd23a9f62c82eb7e6c3649964125586e2abf0c2. 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/USHM21563786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc205e2f4ee4fae151233ed3024ae3be992d6fa15e7a2d80e44397203ec16c3c8. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/USHM21563788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8124cce6fa8d1af9b1ccc424616877cd4eb10974425cf16da4d62f5442dca50. 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/USHM21563790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefced4013ba10943024bdea3b97a9ff034ce8bf0d2eeb09d7d86a7fc99de6656. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USDY41612567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03faf58333006e5f108e90cfbf357b298adab34f53185a5ac9601329f8d9e670. 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/USDY41612568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2ac0f089c648143ca7b3cb6998221fe9b21cf70d13252b56c54fc83ccf50c4. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:18:17Z), 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/USDY41612569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ba6bef0a408fe4bccec1a731bec1ccc34c7094c955c99db8139e6a98a37f0c. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USDY41612570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a111cd25658346345c8bbc3352d148655184845ee62077749a2257511b68be6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USDY41612571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f03a48f3bc74fbb420a0c4252fd678a67abd6c0ce400702a0afbcf92ada4b5. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/USDY41612572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8983582ac32e9711d96edd658d27f401d0467a967af5df0e56f9cf8b8ab0d63b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USHM81914883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1358065f7e8ea5d928a378202dd18b7832756e5530f81a9e040903227e2f949f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USHM81914884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38f9682433e2c033bc03a8034aaac5816e27080f0bec89a3715d8c3619565b7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:45:38Z), 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/USHM81914885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d99835bc83ec007345ef6d91a5650917c3745ac44ebb6adf34e451899652db4. 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/USHM81914887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2490e28f0a1f4f07b21e603eae42decf8c93015e9dac84ce761ca9ba9ca135fb. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USL4Q1958993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6902b0c1dfd25078eea5d30c46c078120b4f3ddd89231009c65b78a5cea34cf. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USL4Q1958994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14eae9740c7282bf8dd91169969c25cdd3a5ed4dd68000cd06186722c68af046. 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/USL4Q1958997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16950ef90759e5853ececcec11ce779dbf101b741fb5565459ff32a13abccf6a. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/USL4Q1958998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2a7ce825d2d81af3b3f9a98abbee8da0caa70e6d95765f2edf11bf5101b876. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:58:30Z), 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/USL4Q1958999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f17d278edd4da7941c87b43a5db7e5ba35d00e247ef6e302b2f76e2fb52361. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:25:18Z), 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/USDY42440763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab962c1dc16fc6e34c5b5cf2446c8e944d602bff6815530e411c454529beb693. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USDY42440764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf915bb7097e397184ca281a8167af8fa285eca161ffab50a3598bb3b66a3cdba. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USDY42440766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d96dfef456856f42de122d7341d95a47152fe85b2888d993abf69027dfeb4bb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USDY42440767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd38a114ab2a50e9e87adfdc56a229ea8c9b57091cc9a763bf898a7ee541fd7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:23:25Z), 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/USDY42440768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe92550d942c9d749c26c09471bf63175c37a42d6c91347a3f49e04412f9baa. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USDY42440769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3607a237d96eb3393a0bbc0a9614c43d0a12ff9ca343b7fbad1ca13c9f261ee3. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USDY42440770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71294d13cbb467c336131da83ecf7d29847ad3b3262809797a671f5fe88e1205. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:28:03Z), 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/USDY42440771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33b0e6036f3a235a98196953f674e7dc21d45acd3186fd47c5c5e41ae90c06a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:32:42Z), 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/USDY42440772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25125377b049875db258a5b3e32f05e212020fd6c9414c9f02c1fcef68cfaa03. 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/USDY42440773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953d7da2fc912d5615045628ec94a55fdaeebe18512f2687e1c1242f35b53bfa. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USDY42440774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621262797b9b234bf0ee71146bf805fd3b0ea4c7d908cf1e11da498d15183c2c. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:38:45Z), 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/USY242442981.