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 0x65bd647ed448e0c91f621940371e2514340c1b59a0f659b32b885ed04c833fbf. 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/8197768e-a324-457c-9e34-50b749e89206.json and https://artists.proofprofile.net/proofs/artist/8197768e-a324-457c-9e34-50b749e89206.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 0x0dcf6352577249fd1c9a6d8efb730443475d8f5046a39d082da24e75320b2a56. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BEEW72300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94072a75367cd0fef1d0e5eb6d8d358ffd02ebf187bcf380228ee9d13289503c. 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/BEEW72300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f848b4b1085ea988d48720b87ea17fd33146b093df026a54031ca695f4fc5d. 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/BEEW72300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6299ae3ca65c38b68a461f528e78bce0b9bd1812719b3f22b76be6ef8fea31a. 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/BEEW72000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6102c88def12f54dd110c4137c6e21287210526cb748096fc614925a4230cc46. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BEEW72300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d69f392a9dac00dd8314850cc5d1afeeb8ea86a91cbc1fac34fedf166a1e601. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BEEW71600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c124a5f26730e5824fc4b653f73c1c48c0cbed0a46862c699b3f36df690d9b. 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/BEEW72300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e434ba6e087b53a7bc5888c6d44bdb489e68e4dd9a08a9418cc31d4a08db511. 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/BEEW72300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6668b70bb9835cf2f7cbaefb1ff1716bfdd0fa128350e5f2a4b6b658124c37. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BEEW72300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfaa9d297c2ea8c4143f821d2fd9f3a74ee2df6f4dae4a98f05733e6d3c1b96. 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/BEEW71800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d7583a92c761ba756fbf87ecd24f861d2478bf4f2c11350d5fde04d06e1c16. 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/BEEW72300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a60e3b0a9f22bf4baed58672723d740843454ee5489e3f7a00ee5045efb999. 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/BEEW72300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dec9f5a188c865eff285fd6905584261fdcb665c67a8b2f5216a71568a49f9e. 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/BEEW72300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae957c39bc1d1296a1f3dd535ee2cdb0f3f43c8e9bb37ea5e1b2ad84f59f73af. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/BEEW72300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a60e3b0a9f22bf4baed58672723d740843454ee5489e3f7a00ee5045efb999. 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/BEEW72300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d7583a92c761ba756fbf87ecd24f861d2478bf4f2c11350d5fde04d06e1c16. 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/BEEW72300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c124a5f26730e5824fc4b653f73c1c48c0cbed0a46862c699b3f36df690d9b. 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/BEEW72300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e434ba6e087b53a7bc5888c6d44bdb489e68e4dd9a08a9418cc31d4a08db511. 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/BEEW72300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94072a75367cd0fef1d0e5eb6d8d358ffd02ebf187bcf380228ee9d13289503c. 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/BEEW72300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1c696a52c930369ac7aeed99735741971b3b0aab1fc43e14ba3e2eb264ce52. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BEEW72000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfaa9d297c2ea8c4143f821d2fd9f3a74ee2df6f4dae4a98f05733e6d3c1b96. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/BEEW71800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5500d665f7cff1fea67073686bc7e65beea3804c46f14ea0c805d3c59a7376. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BEEW71700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d69f392a9dac00dd8314850cc5d1afeeb8ea86a91cbc1fac34fedf166a1e601. 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/BEEW71600005.