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 0x0446a300fc4cde866d6f0cdb5c90c89434509fecd30a562b8ff5e1096f620e59. 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/cf7f515e-37cf-4e29-870d-5ce80ff191bb.json and https://artists.proofprofile.net/proofs/artist/cf7f515e-37cf-4e29-870d-5ce80ff191bb.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 0x54f7960015e46bbd44c49a60c26bc6365f4ff4fe1aa5c9cb0b7935d1d9adec39. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZES81809504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6692678b78149a36556e80c561cd5b3625dd8cdb94c641cfa63c360640e8a854. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:00:54Z), 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/QZES51913264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cea9094f3019004f5828567b38318e6db8e3bae61d50b1b0ffd5c29c4ef544a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZES71948841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861c2363c9f51c4526db1fa3abc0c72b6bdc6c3f4a09ef47890ce4c658e6bd48. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZES81937953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6854c5a883ce6baf6eb2ffd1938ce6b723d52f1860079ec89ea7bc2a05f09939. 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/QZFYW1955826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0390b5da84cf7f0262c8ac7aeb0927f41c31b1cbe627d99218168c199026475f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:00Z), 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/QZHN41910299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3edd71569fc384c5b7a902d308ca87267116998175c07c4f363d6a50739fcb0. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZHN41910303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce18b81e9e7c83b5279169cc3348add250c7b8501e887cb25b827b6565e09e4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN41910304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a0b7b78ab3653eb24a12060f0104422133c37d51e8de013cae01cd5f2bcff0. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZHN41910306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f836eb14520a953aa1b8e1ef465fecda5ab4f1680970eb558556ff1fbc57063. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN41910307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601632f1246e983b0a301171de69cd341772b757735191ee6a2981cdc0444928. 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/QZHN41910309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc03ecf8d074f4c705e5caad0b6e67c594bd413785ff57febf7be22777a87719. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:01:59Z), 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/QZHNC1919819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4728f77a884e60400d55cc6d33c14b8e11214f1cd3f8d4be59742bf5b3df2c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZES52057886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa77dc146cc07af66b6b92e9590df2941e98c14eb1bfe39791954a35fe88eea7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES52057895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddd7abda8160981266e7f137f8c65b973089ea320012e326ee611fb044bc48e. 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/QZES82139197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90734a87c664a6826ab42754907e8aa13efea016bc506abcaec0d8aa259633c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZFZ42162322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed853eb9c18a2f16791320cd4f7fce35d0f6d94136433dafd162268dab81ae6. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZFZ42162323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8a62da31af20019f8e352ac8ba37b71464f65e34e797164e6bee0553199516. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T12:03:02Z), 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/QZFZ32215770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740d1861f3756b02fa24946947b7d077b0964c801f7c364bbe98db3b466adcd7. 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/GBSMU6545803.