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 0x4578ee5bed70e72f431be1d65038ef8caf6896ac19e04c91ce14aa487a8d5877. 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/1483c96f-82cd-46bc-8b3e-6dc0b65478f8.json and https://artists.proofprofile.net/proofs/artist/1483c96f-82cd-46bc-8b3e-6dc0b65478f8.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 0x84e991a3ab3e68ebb8d0075ebf67095ff70465e74191fef74fee48ae8b8c06eb. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DEQ121749240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202f39fa50dc94cf7d9de9634ec4ba2f41b76b967042808e85ed9ec4ff328eed. 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/DEQ121749247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e169776e754a77cb3cbe813953110b5c0eed87e3cd14d5fe9686804623c00e7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEQ121749751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121764998c38839950a9f2bad8fd67c540d02e10f061a0b6ef01dec85a851111. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEQ121749754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17a5b1cb82fdc4c7753d88d9f515b5441745e14b279821ca5b57bbc38c8a6ac. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:13:20Z), 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/DEQ121749755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc788160b4da4c508e64676f0efd1d2548dff835aa9dd0fa21c21b6c61df65792. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEQ121749757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0266cd670a35d3859dbd5ea02f60c595c11c450db9bd4362fe278e5177f091c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DEQ121749758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406f147514d1834292d5616212da6b0a54baa812154b2b4b8771ef3e4e1f1999. 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/DEQ121749762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea09be24b1c586f39b76bdfd1af7759b747740548ab2a83b5002b46f46db311c. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:51:27Z), 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/DEQ121749763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ecba77c16ebe924e7e9a465adf6fb07de5f0d0c9fcbd1b320e4f90154d808f. 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/DEQ121749765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b76ea91863ef5eeee03f7254d32dd614ce464f049d17a5cfda4c511c34f8b88. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEQ121854164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bc1fc4620e11294ce6f7baf51fddb69d3908b95da794e42a22fc77686e46dd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:40:20Z), 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/QM42K1892526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63358444ae2261b08e103006b13b3896af1a49eb1504eeca000e30d0a429dad7. 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/QM42K1920832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3589a0e81f2fb03069683ce47da13913316907eb9b78d356c2620b02fc6a3a6c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEQ022007052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b6ed37c49f335e315fe6d3e59a6f4716df7dfb1a346b7a5e03cb72441c04b9. 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/DEQ022007055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a64f563cf73926e416593da061868787fa19febf64f27d32b49fb79f752fe95. 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/DEQ022007059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d4e61c91eb29d579e7db5ab9905717c2461e551e920172564ea82b474dc749. 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/DEQ022390508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c58e143d37175c0574cbc040c07eca9fdf0ac529e3fef61cb8f7a01201b75d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAEF1984941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf3043de17548a5137c11fa10135d1adda9a5e3232b8dc5937890dc128a3714. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEQ121854782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5521757e1f6de2de965cf8c2d5c2c78980cb286ad2e24d1f178adf43e2c37d3e. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZMHN2094693.
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