Christelijk Urker Visserskoor "Crescendo"
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 0x7a93c6a59516fa8a8488747242d232a60fe36740f17efa31759f3858cd4dc879. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b81f3edb-d521-4b52-b9a4-f7195e77d314.json and https://artists.proofprofile.net/proofs/artist/b81f3edb-d521-4b52-b9a4-f7195e77d314.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 0x54f278120d5892a53e32d3012c6dd58134aca0b82a35d733a1820cbb83a9e982. 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/NLY8X1802080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9612dda728609e3e7734fc1452171e43146c905e5a4d316d3752ae93529f4263. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLY8X1802087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9396b671789949cda9a95fdfb8277c759933d51b2b57c6e1ce212d02b9e119f1. 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/NLY8X1802089.
Muzikaal Bouquet, Vol. 1: Grote God Wij Loven U
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb72a18a6c60a2ce8fd48c49b337296959fb5209662604a2c8c334ec572ba5d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLY8X1802133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0c1b47ad0bcfa2d201795deddaa3b594437d24ad3e0e7276de07b2f96ddcde. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLY8X1800489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f4b67b91da3f3f32f2a74770a90d367581ccc63a0d8f0e209f5b46be506e4d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLY8X1801786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d48e151970f616b836fcab80016963e51a85c54e5ab2c902e3abcca93ac427. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLY8X1801788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4add9344c28bfb9600363df134936151703ff5c331783a188038a6d4f6775fe2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLY8X1800352.
Heft Aan, Heft Aan - Geliefde Kerstliederen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb46e7a935af928e55c39cc308f09d7f1abf715b06085a9a83d821fbb9061c30. 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/NLY8X1800806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447e2308f1521a372626aaf7bdf9525019e8c4708c9051201f33a9a59ac93326. 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/NLY8X1800812.
Heere Trek Mee, Door Stormen En Door Zee
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4c1e76966b7d4ac7f405b835cfa014d0ecb7b87f72485d56384cf2ac3c1d65. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLY8X1801784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f4b67b91da3f3f32f2a74770a90d367581ccc63a0d8f0e209f5b46be506e4d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLY8X1801786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289a2b2faff8a71b5c82ee3837d00d4a7185631e44ba294a53269476a3c2aa72. 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/NLY8X1801787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d48e151970f616b836fcab80016963e51a85c54e5ab2c902e3abcca93ac427. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLY8X1801788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8e1348475588d5f4456596c2770cb36dfc3f31b441b1658702cddf215676f0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLY8X1801791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f31de3b5ee2918ee026307a057decce0d6a1b98ee7dde7b0b00cb3d736c1a42. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLY8X1801792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc803d7bb57da8a19b56957ec51f926ed76e6441baa88173c2a186268890185b3. 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/NLY8X1801793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5500e1f6ed1aa79cf629abf44240536de0a854b8adde67a4689663569930980b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLY8X1801795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e559bf2c1c732a5a23cf8d771df84d16b6ddc0dc51713d1b745b02d11bcb26. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLY8X1801797.