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 0x57186f964c95955e71f2f794db767408fb9c97c39c31735e465941925fbad863. 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/713930fd-8b18-4030-b00a-fb158508ce14.json and https://artists.proofprofile.net/proofs/artist/713930fd-8b18-4030-b00a-fb158508ce14.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 0xea2706cb461becbc2b468b1817f6a6e7eca54ecaf13ff3acdd8282752ea42514. 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/GBCJY0471001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81dc7dd03822b1e715988934fbe56a21f080c23b947fe5c0c50e6891ae2b057d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:28:19Z), 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/GBCJY0510014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca12aa70c4c97b8bcd134ff06b7d368bd6c77722161d1fbfde2638259cd5248. 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/GBCJY0591001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4987afc406288de0d09e5ab9b1d7606b3e6c9c832247b4fe97f9ab7fb5f4d626. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBCJY0610305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069fa9d1f338dcf4af4839f0ec94067519f1f1d897c304b85c09f0be1432c9f9. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GBJ8D1000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd224bcacf62bea4be4c44720fda126ddb4e813d808fc6331ad8a30051c519fd. 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/GBTMZ1600408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a019c94a23971a55da4a27e4b741a6d5b149f09f0c71092c7b670762d0b4fab. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBTMZ1700705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c97e0b3eeecd7a09f3a6a37cc0160340d82c791e4b42c9627b480224cc9000. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:17:48Z), 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/BEN581800381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560c07f0dde08a91592f9c4698028e2ae6de835008583f96410ff8ea49086424. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBTMZ1800753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06848b3b347d95564ac5ebda284fa4d2332d40599bd058e0221b4bf5ad73b5af. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBTMZ1800833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e3f4ae727de5c525649b42ac3ac5db2bc5a90e55c3eefe6c7d26b3c570174d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBTMZ1600521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72134e48a351e8c72e1aa7e4c9d043af7b60d3af342362d5b1d3b8225b6e7e08. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBTMZ1800834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49063dac96995da2f07be3bb0500e2ea413016c43633fdf3f6b3c891b005252c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBTMZ1800815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8e61c7226560b5a507a5700ea1286f94b43b9c7f90a763167c29d860ce2ccd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBTMZ1700704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a8dc8fba7972283859ca5fe2426d85d6c75ac866a65ff9245591090d5d1ffd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBTMZ1700547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd496f2e5e4a8643321d8f435a5252472b56730cb76ea863cc273b4a87acd95cb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBTMZ1500381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd724233351c947454cef18d24ac14edf3e0dcb1988c85b6212d22b22a3cb7e7. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:57:26Z), 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/GBTMZ1900903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383634cf2ac844f2e0a095ca7dcacebbf627825e26c40f73301b7f2b8919f782. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/GBTMZ1900922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc717ccc982370cfa3d9595233b98bb893d00c2e871ddd134afd8c3fe547621b4. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/GBTMZ2000979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5503dfd9b5413a2847b284c4e41685c5a2bb3ff6d614f3aff058b971dca07180. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:40:59Z), 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/GB8KE1959037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2803fe6ad1a091af2ed0c9175bc50d2836cfeb6c69650a843101c882ff39ff. 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/GBTMZ2001006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8392d7aff5e8708d8950824280f242f0529e7b27c5694ef2975ca85674260d. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/GBTMZ2001050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd215c07a3b2ac2c2a834a8c2bcc2f437e5ba6544de5c64f7ec34caffa327099b. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GBCJY2000667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f48dfba26b37bcff5674a693d99471a2901fe46d1d855ccf6ad5743fb135931. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBCJY0510022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8215f5cd2e0dfda8b07096048e8b3d8e8fe6548c68d43c8e067cb9e6e562be9f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBUM71505206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedeca2c1b3cd57beb658771f2e0a27b4e332f07f8a8715c8ca526c7ccd9a5e1d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8KE2050488.