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 0x86f5465d323cfe4f976afaf65e94eb13efac96a070dd54558578116661c2dc6d. 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/e5a0baf2-4989-428f-914e-a74d44529126.json and https://artists.proofprofile.net/proofs/artist/e5a0baf2-4989-428f-914e-a74d44529126.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 0xfddb9ab82162ae09dca2eeb71d9816fc8fbabab2993e5406f1b6ff347f189460. 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/TCADM1867087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08c8613ad02cabf5c7ca87ab26e9e8a0898464ae194a62dbe81825abc904141. Chain 2 (Bitcoin): anchored in block 957959 (2026-07-14T05:54:20Z), 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/FR7S02000480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8742e9e23398d5b1240eb40d5d052e88b35ce889b5772dc3506e97a8a1c1cd. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/FR7S02000310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fdc73926d342377706ba920cb2c165dd00feaae3735bfb00964adbc5437f90. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/FR7S02000220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b9626563ee372c9e630dda6fa88707e43dfb323a8c6bcc799c869515282919. 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/FR7S02000710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306c3615b106a4605ea953185bc22ef5161425723216bf685358c0ec05b379b4. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FR7S02000740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796d45fbba7821dd10e99a580fd88a0e370e4ba68b11ac06aaace435279e629b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FR7S02000720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58d865ae6c5f1f40e06b5fdc44fbf8cc86db5d22dbc606e466f2318abc5d7af. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR7S02000750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab0b2f1bff5506fff260039495af865c82a8ab4dc56cf6fb9aad3c97fe2ccf4. 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/FR7S02000760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dd83ef01fb5b9d284f7ba8ff2f241076674990114b0902a78b28efee3ad72d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR7S02100730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a1b87c673882e93050503c2688663eeaab01d12dd0414c430a72dd85cbdb05. 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/FR7S02100690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e99485fa5232a690a8e88710116d66d49018ac5907ee36d9beac17c107608a5. 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/FR7S02100740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ad25fc410bafc4f1f7bf03075180ebcdcdc14d4d51cdc2262ccd814f666896. 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/FR7S02100750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde8c522f5f9a118201e701fe731ef62936aebf42ce1d30f2bd73b7cc6cd0043. 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/FR7S02100700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaeb8b36251e32985f89cf0e6beac47c4e563804b510f9fd8444b16ec3e6d389. 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/FR7S02100780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bccb01819ca0b8fe9b7160ce1e2c7acf7ac53a3c2b01ddea0953047547cf2e6. 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/FR7S02100710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c7fcfbd6c96484b84b69312e047e9da10f9a98c9a07234f0c4752ae88a9ac3. 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/FR7S02100760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974bd78c7bb247d313ad78d35392a93bd78db72c7a27c740056f863fa15f8515. 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/FR7S02100720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a14cbee1dbc655d61362b4313ef1f43e395bb9efd7eec5fc3007d7f5cabb190. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR7S02100770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129f601bad28c2271d9cf8965470bfd5aa92cb5448b73f28ec5199d120355c9f. 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/FR7S02100790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada5edae4f17c561a687209c44de49a966633a0c098a3eac75015643995495d9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CH6541873243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e289d8619628fb13bf2b2dae5238d546c9a900187b2e7481301fcc432598ae9. 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/BEKV42100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bc2cba30c54c741ea739b6bcdead7bc324a7150b4f6e29b6a07fb03018d2ce. 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/CAF661900841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ff887d58f8a0ebe865ab6a69150932e6604c1e87cfb0f856411ab3e4132188. 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/FR9W12139958.