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 0xfc6b5e48f2e90cef20e8727341f3b604659672ee1ea8cdf5a732b8771ef73cb3. 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/df439bf4-aa22-492f-b7ce-20909b6bbfd7.json and https://artists.proofprofile.net/proofs/artist/df439bf4-aa22-492f-b7ce-20909b6bbfd7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xf53690064340c4ef7bab9d19175b22a517ee72ea053d944c9cd65756def3c79d. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZLBC2405488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68984bb23bf92bc3441fda8998088fb7c972d077dd8091cbe4593feec69e151. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZLBC2406612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa013118162f089b0cb25200b64a8ab396b3c0902e7345fcdc821505bdd09e1f9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZLBC2406611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf130856757c99f6859a12fa6dfab9df3bd2c5d7a5e7bf4c3cbeff33602a68456. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZLBC2411314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637befb4ab6a96b7a948aab8b711777a7d865f7c664a1ad752c5424a8cf28700. 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/QZLBC2412968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1dca8b94e5feb768fbadd668c865c5028fc48d97be9a9dde4b1c6b65ea979f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZLBC2414269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b238d1cd335591c81ac7911b3e3cff5d22b9c02c5cd2ecc9ba6e5f5e38644a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZLBC2416080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2139306baa40eab6ceea6ff6a48011d1618a440f23ceccca5f36d88f3d3017ae. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZLBC2416678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21eacf687e22084c654398d242bc0f36a4e62aad2624a9a14a52275c7f1f3f89. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DEUD42430896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b9c692315c8a00f7d40fcc7791cdca6a37868b813b62f4c896e017b03c9637. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZLBC2428890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913da0d796d968e390fd6102c50366880679ba38dfe638bdda164137be2f0265. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/CA5KR2511094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2152e89b2bec4e947a9f86d0e5a3503ee2ef369c9d95b611fb0230aaa2aba500. Chain 2 (Bitcoin): anchored in block 957625 (2026-07-11T23:15:09Z), 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/CA5KR2512810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20516cb055d56aaf65eb4f26e439e8073878126895006be3a30f0fe29946c40a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CA5KR2519815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bb0977eb9d4f1b7d2e428c23f1f35e663645ff2dae0e12cc9d8cf0f643b220. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GXESV2597114.