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 0x0337120193664d23807198371f505039e5340b9a9d78829c2be5c3307e44d386. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1c02835-d554-4983-8654-7841f65e8e9b.json and https://artists.proofprofile.net/proofs/artist/a1c02835-d554-4983-8654-7841f65e8e9b.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 0xa97a9548fc04aa9bf67ffe1a6d881f3a6b549053567d070cc173e48674f4b00a. 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/BXIV82211072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077c91717ed19dfa74d81d0ab2fa0487373b66380c6c683b91f34926a9146dea. 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/BXIV82242250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f289f22b2822ceb6a1ed10da1cb1bfcd7c4b6ab7a251d24b47c3e2056f4f34. 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/BXIV82211454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed5a42fb1df89a3304d8a8c5613b14636adb088c98e30ad2091fb0818c561eb. 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/BXIV82219985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8ceb41d226fd09b8032ab2bad3deedf0786821f80e637d5e9f3e05cbfdb1fe. 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/BCBBK2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380bb1cc6d7fe1823dceee03eba3661467b78807521eaa6eaaf490cb38a7c498. 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/BCBBK2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28bec40cdbadf0cac719c3815d2e7e77820f20dbd89832c759306160bdb9096. 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/BX5UA2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdf7fdcf8958aa62ba1e17a169129101fd5e8b388bcc8d75b5ab4a0140bbc2c. 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/QZNJX2079929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02a9ae38e9471aa8e509e82bfb596b516a7d09a2602ec967de201570fe3bf12. 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/QZNJX2079930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a471f9ed79eaad087baa13ff5fa68a53684973f7f9eb1ae4431dceae2c040a. 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/QZNJX2079931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2158db2fba6889e72618d64d05a34808bed7893b02a050f1692fdf6478b4e3e7. 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/BCBBK2000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d461ddddd132d43fbe654af06bac68c02f10abd35de333b234c2209e3cc8af. 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/QZNJX2079932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d831bb93b7e61ce200de262f7da1779473309ce2794ca07f216a815ef90399c. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BCBBK2000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf628d7d6b0db3e28f14e8b40a8ecf91545813852ce670b63ebfc8f0e8233e4e7. 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/BCBBK2000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e929d15042220a6394376b801acd5f59eb228bfae2fbd00b2f56503048a940b. 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/BCBBK2000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86131c23f20917934c00cb89645bc2647703fc9496c6829cf560429ce28795c6. 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/BCBBK2000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7342f43fe6f6ee39b67d72694499f83eca39418bfe4f7b6a0f793b52582bad. 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/BCBBK2000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49678301d56f10b7ec17e926970636ddb92f1b4b3be758d061dac199d37f8303. 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/BCBBK2000079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ecf6081cdcce266a91f37e26af4f7e0a1f42c252665ec940652dd8b8d640f5. 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/QZNJX2079933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d95af628ee4ab40d1fa74585255ff15113a72bc0d15a15cd3d923a7f579e962. 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/BCBBK2000078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9945a475a7a993bb36512ea2aed88574534d09cca717c2a41b2e374d6b403b4. 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/BCBBK2000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e7f936056578e0a6fee23a92c632ad9b58ae3e76a2e1c65482cdc00718928d. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:36:52Z), 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/BCBBK2000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5916b4f26e62654330a764618ac4227cf652840f98d5ba24d15c3444569fc5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BCBBK2000075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeebeaa81adef5178d536620fbe31fb2bdefbada0016a616630fa5860388b6a8. 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/BCBBK2000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263dec71c6a9cc566536799bcaf366496f3979f5bef83adda1e02eb1dfd048cf. 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/BX5UA2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca956bcadaf24009b07993804f699bd6daf256a82cfeecda5162e3413df98277. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BX5UA2100003.
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 0x6644450892cc2f58eeefda1501b7291f7a1e85f21b627f5ffc2b45df9ea28424. 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/BX5CZ2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1a55ba7967b70f46930a9bae8cf14dec01106890376949b5370343b1a9b249. 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/BX5CZ1800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608b5f8262fa44391ec50885af3825688e1f5c0d228b976a7a2e4566d65d5d04. 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/QZNJV2579058.