thumb|Kayak paddlers in Pakistan snow training at Hanna Lake thumb|right|Inuk seal hunter in a kayak, armed with a harpoon|alt=Man sitting with legs covered in a boat that tapers to a point at each en
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 0xaff10c4b5e5381b034c4530e67033d576a1749fa295801fc58b5ff07a3ca4175. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23abaff3-5c80-410c-951d-0207da73e241.json and https://artists.proofprofile.net/proofs/artist/23abaff3-5c80-410c-951d-0207da73e241.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 0x3fb74243bcff06d86021f7a368e245ac82641227c65b93439de254b123b9976f. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/NLA271190001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6afd079362e2d05512c6558f03bf99c089aacb65d373c405a2b952e7dd72ff2. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLA271190002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4035258b57f7070c142eb6a7eadecde21aca26688f7736bc77a546a545554278. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/NLA270400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c82bc61963942561be03bbda40a31a563c235d9721141492e8e43ceae837bb4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:04:20Z), 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/NLA271200183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b8fe067aad3ea55f721b9796af0101ea731ce419a746431fed5bc49a4fdb3d. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/NLA271200186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493480424577d1efcced86831647e06ec2b12349b6160ad10ef273722402a044. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:27:43Z), 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/NLA307600070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2335aa7a44eef6f3da7e6b8f6e5425c83569f036a6ebc7b03df12bb89fa3034. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/NLA307700092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfc51f1acbb08174de80e76dc9caec7673f9a96fc26fce96ed48fff9e6fc8c5. 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/NLA307700094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6601ccbe109e6b0825fcbc9e9402a939819f51011d1aae8fce68f4fe55b6d767. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:34:22Z), 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/NLUM71700249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9df26eb979575e199bef5ff98456c98611116561a55fc70b2d862591d1ccd9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:45:44Z), 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/NLUM71700492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3450a9ff1a75f9a0c5b66e2822ab61e31bd171300402c09886875fd3783bfd6. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/NLUM71700252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b0b2642c491318d88779704a5db26378e377803e0db6cb3c90f77cef6df823. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/NLUM71700256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ad13f61744681a277d106bd34f64689ca9e3994cbb38a84a2403fa15bd96a5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLW241100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876abf2b4059a85250467b3a8f46f9a2a39558f8f40c7732ddbedb2e24143cf7. 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/NLA308000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91463d164a82812fa9c710032e9d08a3c9484eb4380d3b918a10529be08ca059. 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/NLW240600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8511234157a2a66609fa76537241e932813c57db1d9f9abd3130794f95b1bff5. 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/NLW240600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b45dc201aa3d93f1bce7aa2944df868b0c98a91f1986585a0940017c7e71f32. 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/NLW241100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3569053b555c251148927f064b4236e6cd5b5a506f43d809dbfa42756f4cef. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/NLW241100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ad767c0eef41ceabbaaf4e5f2394071b1cc29b729138395e4b8f3e1f134829. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/NLW241100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4327249ad8fe2c25f3e12e32d3019e06e022a1a2d3f98532aef1e2b263f54950. 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/NLW241100006.
KAYAKoustic (Live at Theater 'T Kielzog, Hoogezand-Sappemeer, 23/11/2006)
Anniversary Concert (Live at Paradiso, Amsterdam, 07/10/2008)
Phantom of the Night (Very Best of Kayak)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9689eda70f4de0fb8eb09274d7d15ac40efbe29b46800ffd4b0f382bdbfbedb. 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/NLA307800070.
The Anniversary Concert - Live in Paradiso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510fc2b7487e00e7f00d1c274c60744a47e6a3230ccae54fbe480c16d4460d32. 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/GBDHC1880210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a1ecd160a158bec2660e7d0dfaaca87987a040e1e577050d735c3299872992. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GBDHC1880212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe459f6a5654b59d40d47e0a2cd73e57fd08cab68efdd0d0aa5b5d010b278e804. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NL5QZ2500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac8b2c786eccd338088b4fb0b54ef2831e8777a1770629d6e3dab06ca59f59c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/NL5QZ2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba0cdb0e8227be89f1c094c2b5171044ed88555e42d7f40eac66f126e8726b6. 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/NL5QZ2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46e7468ec2e72dd205f11e3f4b650710b39878be128ae51b7bc9a846c6c3f50. 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/NLUM71700250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde577bef0acbc024c7efd6308e84b00d29dfd8b79ee73fa4df0211310c44b1a1. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/NLS241103986.