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 0x091ef653a296cff5bcb5c7b0239623f2bc4ba6ccc5aabeb9b43766b0635ab223. 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/ff894ea7-19fa-451b-bcd9-290c679ee1d6.json and https://artists.proofprofile.net/proofs/artist/ff894ea7-19fa-451b-bcd9-290c679ee1d6.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 0x5d983033432767fe15845c7b16fbe10600284eb02eb3c6f40bf77db1eb08994a. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USDY41625510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e696d5a1de93b1790b3d6320c6acab1cbe464405e5fcef5bbc0bb83338001a2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDY41625515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2e5b61a65d33b7907204cbd149863edfe28494366d43085993e78a18b4e3f1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USDY41625517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fbdf41e6c8493780a791533f51ce0236521a9321a47b0be2187ccf653e16a4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USDY41625509.
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 0x4141a0fa7896bfa13bb4ea053b698263e7abd6d775a95f81d6e07d9e3e808af4. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USDY41625511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6438a5be7dc13cd36cb3396232ce0c3fbf3c76c97f1c6f95c44afe0ee0a376ac. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USDY41625512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb42a0797dff479d34ef498a1cb4c63bb89c353079f80e1f300af76a2ef25d4. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USDY41625513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb460a13a065d9c9e71d12f1a8cf9969300c7a2f5569aff5f24ac93f3f775ae03. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USDY41625514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b828a433dbc7bb0ed2343a08f63f9cb3da573f123489cc173d8bc1c4757ee8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USDY41625516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2ec3aa799d7e5cb474561201100cb772190cb9f28a62e58ef8e3b44d2ea947. 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/USHM91791267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba4c42253bfc008d945c673ec4482065ea1dabd579d90f0e79b4bc5609b1569. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM91791268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8e2983f4ddc4d8cb277a2b1ec655c279b41b64464a66bf5f0d23d8c883f927. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM91791269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac834aa806c3de6e98aa85128db6aad4bff45c23898527f8ee10152a96e35ef2. 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/USHM91791270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46ae2c06d01ef136bfd6a895f896a70bd46576f9935acf3b071fdbfedc6a082. 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/USHM91791271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d698d1c621046d87f4ce42bd80b2baee6c0798d3112c7905717db4d53e9526. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM21572475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a9d71bd8349f4d646d2fa6f900e395f275d68a42d686e694f295704d5b12db. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM91437962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae40e93ec0d12418a5b625985a852007132d8655be6b302ab2f30fe3fbf80e5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHM91437963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3a5f98faaac2b620730b1c9800bee68567a75562b6054a6b653ae6cd22a77b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM91437964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184603fcddfe64f8ae440fb585003bca5aded7b127150a2bbaef6fdf39bbda30. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USHM91437961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335891e8a757698464d82d6ec8d8214fa581098173f376ba6c40f80f1a1556d1. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USHM91437965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2243ac6c347d354aa0a42f00b5dd0d69d432a17a7f57760324c01cc80645ebe. 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/USCGJ1347688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e0b4f3a2c5bf88cdd3b19e7a18bf23b9d849612b77df502e338dba350582c7. 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/USCGJ1347689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c832f00cc90a99d52a1d525589a432a71afeb06e1aca4a2db2204b8f90565c1. 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/USCGJ1347690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46179bf24ba32146c0b10ae2edb6e332cc8409d2ecc23f7fde6ff7435527b669. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCGJ1347691.