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 0xe0c32ffd2a25dbb2acd0ad1aaa31a1644daf7ff83c6e93d298a2624babcda0fe. 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/ef8fa48c-66b9-4a66-9de2-d5a41c7e0a4a.json and https://artists.proofprofile.net/proofs/artist/ef8fa48c-66b9-4a66-9de2-d5a41c7e0a4a.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 0x9a28397c6d18984c55b9a17961775fab032a10d659f8092a53b602342986baba. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLX1N2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9083d24dd93990f62a38364fae6111403eb1faea311b3a4a98df90fff657a3e5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG661500217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cedf414554fd5222507dd496d1c7fcd20e91860a97950148b5b17d310a82848. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG661500224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736c6773fb2cabaee1f15e4f90ad5c6e8e2428b3bbd50fb7a2379fea9951eed7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG661500216.
Miljonair (feat. SBMG, Lil' Kleine, Boef & Ronnie Flex)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e82bb0aef8067753e11d64b7a1eedcd70a6090e9d634184008e476d25d69c67. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLV6L1800041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbc0bf5abbd083387ff58d2e68244d0d944424bdf7d3d020141b63656dc022c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLG661500221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ed4f95e5d463337155c3e49fca376f9f947bcfb8af335c8ce7d1ee64c5ffbd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG661500215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb4011e48d3ee0995318f9ec2f41a7de690149a98c0145e36bfd660b2622cc6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLG662200260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c64ae43153268797b7e5b317a9e36672f141334111b23e591c6ab9e4a05fb77. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLG661500228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542890e5aeefdd8b50550f306da09d2175d9d2a7c88a45126ab42a73ab5ea881. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG661600322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68d162c3884a5c296dbe4afa0cdf48d42358e616e9321a7ee540711c47bfdd0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG662200265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6f1d882b04366c815ed6da5ffc7d684498c5718244f5b60a1ce4dbb3fbbca5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG661800524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443dafe55dfd1bf3564ba2475aef1d8207f1ef03bcd297e6682579d914cbe806. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLG661500219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3724e31d786369311732ac66cb7abd8e5eba7905b58406102de0f9207922c4cc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLG661700539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667d8e1eaecc33d9f5c3812bc3b86e0ecc4e8481d84f5f5461deaba2bef189ca. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLG662200268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054b896fabdef831b95e27d7a74e54c5c7565ce39986e541781181ea49ca4a03. 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/NLG661800785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edec29ee15c591f00a699e562d52cbfb430dc927709155ae8abe88c53f92f32. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLG661800308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31a437b3d7a69b810225087b80720925a99f9634a71331e97d7b75b78ea69ec. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/NLG662000470.
Spraakmakers Vol. 2 - Urban & Hiphop Hits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369d09bc75202001aeb7cac569d5b83d7a4212094596bf350fb8d2164659012e. 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/NLS5K1700078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369d09bc75202001aeb7cac569d5b83d7a4212094596bf350fb8d2164659012e. 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/NLS5K1700078.