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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7daf154b4232994112e18abe55a6fc75228dba3804f441c34f8c9059e1befe3. 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/dbe9d834-6c4f-4a35-b077-36fbc493fcb9.json and https://artists.proofprofile.net/proofs/artist/dbe9d834-6c4f-4a35-b077-36fbc493fcb9.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73701381f35c62dece9fff9312128f88de831fc6de6165ca02635cd1a0ff664. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCAII2467693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd82a53bb92270c7a80efba037562d969e99f3c72e65b0bae671fdf6bcd0693. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAII2467698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5798561f575f020ec9f77aa595d81fc514210ab5dbe1af3afb11cfeb099d235f. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAII2467700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7101fcf18af0158da4eb0d3a0bf9e10143fd7e420381cabd4d1c0a245b905952. 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/TCAII2467702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156d5c7f36760483fc9549a2b94da3805eeffc04c6e7807bfa8bb3d43f3a0c59. 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/TCAII2467704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920d372101ba8b336d1850d47c5054a7074607f4c60d688c4f94f26adcd240eb. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/TCAII2467705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e1847ba41c839d01d957862c1b5e5ef946d408b704d93ac2b58013be602523. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/TCAII2467707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bff90379f264dca4b15cb9a92eacd340bbd46ea2cacbc0eec174261d4384f9. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/TCAII2467710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ea2104ddcef66a4c7f19415eaad89319f90025bd8baaf5062a7d664c575bbc. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAIP2444992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9084739ea2a2f8217cb69135e9f89d9c2356e298b7c9d5bf68d0d93b23bade26. 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/TCAIQ2444994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e688e12c290f58c0cf0796a44fb878d58ea9f96594f6f6ee66e2d415c4c22c. 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/TCAIQ2444996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff71a514e9eb824a7c5654012047c6073292bfb7b07b3bce7855e0d2c847afb8. 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/TCAIQ2444997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f03c729751101b98ef38d31848c57fab39422b9a74f61fb0fb8eaefc0efdf3. 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/TCAIP2445002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314309bfc495890653b4519ab977fd822375eab213ebf672b423bbce80ae87b2. 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/TCAIP2445006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873cc7958cd8ef149900401066913e60afca0170cedba0b16f0df8332b957529. 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/TCAIP2445008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57e7b19dcad18f1ec1756709959d41c1bd4292a19d89e8a9494f1c6fc2350bb. 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/TCAIQ2445009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e02af6ea0aa24e34f064e9ff86e56312dc7cbd266f7562dbf909a30e5c0ba89. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/TCAJA2495963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1771f656e18565d52e16f973b7c18ec91fc8e89fc38d41c3fad426c6f910652d. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCAJA2495969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2240592d90fd29c61b70293cd68543bcad2893e87654d96ca3efe0f566afcce4. 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/TCAJA2495973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fdccd19af67e1c439dea843c51a06aaf783f4266e13c3d69daf7bb3d140f3a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAJA2495976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc7e2e050e9d0aef58d6cc614761260c9f259478697777f43c4a220f3f4b5cc. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCAJA2495982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568c16accf63af9f2c813a22f448622787c0d8124ac3f7f0116ccf2c403462e2. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAJA2495984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66c18bf461be8bd1f2c1baea1b1a9cdd793abae22c4eb7a49b0f888014d7ec8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJA2495988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb1217c471539252e4436edcb6ec9ac57d6f59f073515337c4758615e89c10a. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/TCAJB2495991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb6e757fa971ac6434320de0dc372557ea9cfb444ee13eabcbc4febff1798ba. 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/TCAJB2401086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba81f4d99201fa3b25f8979e55be643db86ffd9ca84cf3cfe6378b3dab63378f. 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/TCAJB2401088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0d678897c84bfd0ec883c35f8f91bf690c2b2d0e3cdfdad0532fc33c511c6d. 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/TCAJB2401090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa50900151381e5d7d73e29e8a9437736891957eec037eef116154c0aa3a830. 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/TCAJB2401092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8db973c57618f307bb56bac9c12ba201dc093f667db0bd7464f3598e27d06a. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/TCAJB2401096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb81dc41a8f10e40eaf413fcf9216e73a47db9004d13f529d30cd4626cbf3f76. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJB2401100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4965e125f14aa180c77870abbde5ba6684bb03ce8150098752e897835609c64. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAJB2401105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b4dcb374b650795e239eeb4e7ef02f203c96c3fa6457634f8e9991d8ea54dc. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/TCAJB2401107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1345ff02630478245b512f3aa3843ee74370ff93a03e6465bf8e9a7536402cf. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAJB2429886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3278e2d53aaf4fc7412356957977cb1a465d93b0a756ef792be27219b9ea83. 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/TCAJB2429891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa499b6a1345995d0be9aa3fe64f6eb31482f8a640ebebaa028cf42142e103a56. 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/TCAJB2429900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b24c48d6aeddd1b97f7c9a1f5c7ba8f0fa9b1c66da326c369ac12ce43de83e4. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAJB2429912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d6e304a6577de89362aeca810d489b5e93ba177701b6faea82a5ddfdc5835b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCAJB2429921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325d3dc049f951c02dddc913b959f15abe4c567e51ed30e71ac7ff3c7dc1fa29. 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/TCAJB2429928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ec3e6dd37f7b25a6539ec4422d5dfd34e0d6c60082a4ed6f8b43f99105a17c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJB2429931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5112722eb7ea9760e3d70633c81a902e0fc8b3a6649a3c20a74da8a3a8dbedd5. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TCAJB2429936.