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 0x4aabac2e87bc2212024b51bd5d101a4faf9dd3d23f8ee75c1407e61700c41735. 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/db75f8d4-7930-41ed-931c-bf5fa2bc7e93.json and https://artists.proofprofile.net/proofs/artist/db75f8d4-7930-41ed-931c-bf5fa2bc7e93.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 0xd8aa35df5340dec30c6a9d5c33a6d4ee76f5f50979868b1a1cfc1aabff28c291. 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/ISA111204002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96eeacfcf1a7b5b6fce4a3a2774fc11ba8c3dd65682421e3b057c2afd157e80f. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ISA111204003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba55a2293f7c5bc67b739ea3546b44affa35d9b691bcce588864ba04ed8441c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ISA111204004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a3cccebab5b6f1d92ed3cf399796d536e00b8b81cdc55f09a70f25e363c857. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ISV982029201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8127cdded055a58f022784cec4c3648cde462744fe7198f592d016c0e2946f6b. 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/ISV442334203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c08926d45c9c432e5d84e65e1e4e1ad62f1fb0a3a5c2cbb6a36656e45e175e2. 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/ISV442334204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3e6ca8a531d5f0836272239a91a58693e76fa6860ebee3b0d8e422f67bf32f. 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/ISV442334205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc915a14650a145ec30d4797b1bca20574bd2da5f4ae015419df748024f676a93. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ISV442334206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab5e12b2d002a0637b33fd73700474c00cc2b0912adb707d5bd03baa899aa0d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ISV442334207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4dc7cc4a6f552ab4ca5c03c5015fa7975d3b2230c45a6157e8e9d4f8f60e10. 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/ISV442334208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41c8e7bbe2615c43d6136c639afd336d3a3d797f872adfb96c52fff37047f0f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ISV442334209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b1939607c07697509e77d7facc63ddb94693b1748377467b29610d1028eb4a. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/ISV442334210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa79920dbfdce9b21f8afa5bbaf213a936104ec8ca1e6f1cc568e81d49a5b7e. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/ISV982447801.
Jól Eins Og Áður (feat. Sverrir Bergmann, KK, Birgir, Sigga Beinteins, DJ Muscleboy, Aron Már Ólafsson, Ragga Gröndal, Katrín Halldóra Sigurðardóttir & Jón Gnarr)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ff73d11942ec8fd0496644023c5dd5f09a30cf9ac69a5c5fbbbaafac8d24f9. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DKADG2001049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a52094c94f3f0a25d6b90d795c1c053486c9198ec63678a02a19928bcc4f89. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/ISA110307102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0403a761be992b350095508b66fbd4fcabe7226fcb31d7c1635e278398866370. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ISA110605504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4c06463d4d84294015d32692053c02e1f748624d754685f3de881c106e18b2. 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/ISV441628205.